Document (#9098)

Author

Shrejder, J.A.

Title

¬The algebra of classification

Source

Automatic documentation and mathematical linguistics. xx(19xx), S.52-58

Year

197?

Abstract

Any classification describes some structure of taxons on a subject field. Thus, one of the natural aspects of a classification theory is the study of possible taxon structure types. In particular, two classifications generating isomorphic taxon structures (regardless of size or how filled they are) could quite rightly be said to be of the same type. Let us formulate this situation in precise terms. Assume M is the subject field of the classification (the class of all objects to be classified). We use T to denote the set of taxon subclasses identified by the classificational features. On taxon set T the is a natural order of inclusion

Footnote

Übersetzung von: Nauchno-Tekhnicheskaya Informatsiya, Series 2, No.9, 1974, S.3-5

Similar documents (author)

1. Shrejder, J.A.: Stratified tolerances : toward a mathematical theory of classification (1973) 6.01

   6.0137663 = sum of:
     6.0137663 = weight(author_txt:shrejder in 3983) [ClassicSimilarity], result of:
       6.0137663 = fieldWeight in 3983, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.622026 = idf(docFreq=7, maxDocs=44421)
         0.625 = fieldNorm(doc=3983)
   

2. Shrejder, J.A.: ¬A mathematical model of classification theory (1968) 6.01

   6.0137663 = sum of:
     6.0137663 = weight(author_txt:shrejder in 5532) [ClassicSimilarity], result of:
       6.0137663 = fieldWeight in 5532, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.622026 = idf(docFreq=7, maxDocs=44421)
         0.625 = fieldNorm(doc=5532)
   

3. Shrejder, J.A.: ¬The category of comfortableness as the main criterion for knowledge organization (1993) 6.01

   6.0137663 = sum of:
     6.0137663 = weight(author_txt:shrejder in 289) [ClassicSimilarity], result of:
       6.0137663 = fieldWeight in 289, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.622026 = idf(docFreq=7, maxDocs=44421)
         0.625 = fieldNorm(doc=289)
   

4. Shrejder, J.A.: ¬The logic of classification (1973) 6.01

   6.0137663 = sum of:
     6.0137663 = weight(author_txt:shrejder in 98) [ClassicSimilarity], result of:
       6.0137663 = fieldWeight in 98, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.622026 = idf(docFreq=7, maxDocs=44421)
         0.625 = fieldNorm(doc=98)
   

5. Shrejder, J.A.: ¬The cognitive approach : a tool to resolve the opposition between technical and cultural aspects of knowledge (1992) 6.01

   6.0137663 = sum of:
     6.0137663 = weight(author_txt:shrejder in 1408) [ClassicSimilarity], result of:
       6.0137663 = fieldWeight in 1408, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.622026 = idf(docFreq=7, maxDocs=44421)
         0.625 = fieldNorm(doc=1408)
   

Similar documents (content)

1. Szostak, R.: Basic Concepts Classification (BCC) (2020) 0.20

   0.20101698 = sum of:
     0.20101698 = product of:
       0.5583805 = sum of:
         0.038991597 = weight(abstract_txt:objects in 883) [ClassicSimilarity], result of:
           0.038991597 = score(doc=883,freq=1.0), product of:
             0.11423616 = queryWeight, product of:
               1.0667552 = boost
               5.4611917 = idf(docFreq=512, maxDocs=44421)
               0.019608818 = queryNorm
             0.34132448 = fieldWeight in 883, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4611917 = idf(docFreq=512, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.0771002 = weight(abstract_txt:classified in 883) [ClassicSimilarity], result of:
           0.0771002 = score(doc=883,freq=2.0), product of:
             0.14284003 = queryWeight, product of:
               1.1928557 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.019608818 = queryNorm
             0.5397661 = fieldWeight in 883, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.054920312 = weight(abstract_txt:classifications in 883) [ClassicSimilarity], result of:
           0.054920312 = score(doc=883,freq=1.0), product of:
             0.14354175 = queryWeight, product of:
               1.1957822 = boost
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.019608818 = queryNorm
             0.38260862 = fieldWeight in 883, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.06686222 = weight(abstract_txt:quite in 883) [ClassicSimilarity], result of:
           0.06686222 = score(doc=883,freq=1.0), product of:
             0.16366033 = queryWeight, product of:
               1.2768347 = boost
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.019608818 = queryNorm
             0.4085426 = fieldWeight in 883, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.07325248 = weight(abstract_txt:precise in 883) [ClassicSimilarity], result of:
           0.07325248 = score(doc=883,freq=1.0), product of:
             0.17392865 = queryWeight, product of:
               1.3162807 = boost
               6.738623 = idf(docFreq=142, maxDocs=44421)
               0.019608818 = queryNorm
             0.42116395 = fieldWeight in 883, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.738623 = idf(docFreq=142, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.07348156 = weight(abstract_txt:inclusion in 883) [ClassicSimilarity], result of:
           0.07348156 = score(doc=883,freq=1.0), product of:
             0.17429107 = queryWeight, product of:
               1.3176514 = boost
               6.7456408 = idf(docFreq=141, maxDocs=44421)
               0.019608818 = queryNorm
             0.42160255 = fieldWeight in 883, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.7456408 = idf(docFreq=141, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.028618747 = weight(abstract_txt:subject in 883) [ClassicSimilarity], result of:
           0.028618747 = score(doc=883,freq=1.0), product of:
             0.117111616 = queryWeight, product of:
               1.5274885 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.019608818 = queryNorm
             0.24437155 = fieldWeight in 883, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.03962897 = weight(abstract_txt:structure in 883) [ClassicSimilarity], result of:
           0.03962897 = score(doc=883,freq=1.0), product of:
             0.14549278 = queryWeight, product of:
               1.7025453 = boost
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.019608818 = queryNorm
             0.27237758 = fieldWeight in 883, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
         0.10552442 = weight(abstract_txt:classification in 883) [ClassicSimilarity], result of:
           0.10552442 = score(doc=883,freq=3.0), product of:
             0.24417683 = queryWeight, product of:
               3.119214 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019608818 = queryNorm
             0.43216392 = fieldWeight in 883, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=883)
       0.36 = coord(9/25)
   

2. Gnoli, C.; Santis, R. de; Pusterla, L.: Commerce, see also Rhetoric : cross-discipline relationships as authority data for enhanced retrieval (2015) 0.17

   0.16582571 = sum of:
     0.16582571 = product of:
       0.5922347 = sum of:
         0.0849993 = weight(abstract_txt:class in 3299) [ClassicSimilarity], result of:
           0.0849993 = score(doc=3299,freq=3.0), product of:
             0.1331658 = queryWeight, product of:
               1.151753 = boost
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.019608818 = queryNorm
             0.6382967 = fieldWeight in 3299, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.0625 = fieldNorm(doc=3299)
         0.054518078 = weight(abstract_txt:classified in 3299) [ClassicSimilarity], result of:
           0.054518078 = score(doc=3299,freq=1.0), product of:
             0.14284003 = queryWeight, product of:
               1.1928557 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.019608818 = queryNorm
             0.38167226 = fieldWeight in 3299, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.0625 = fieldNorm(doc=3299)
         0.095124766 = weight(abstract_txt:classifications in 3299) [ClassicSimilarity], result of:
           0.095124766 = score(doc=3299,freq=3.0), product of:
             0.14354175 = queryWeight, product of:
               1.1957822 = boost
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.019608818 = queryNorm
             0.66269755 = fieldWeight in 3299, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.0625 = fieldNorm(doc=3299)
         0.15282083 = weight(abstract_txt:subclasses in 3299) [ClassicSimilarity], result of:
           0.15282083 = score(doc=3299,freq=1.0), product of:
             0.28397357 = queryWeight, product of:
               1.6819068 = boost
               8.610425 = idf(docFreq=21, maxDocs=44421)
               0.019608818 = queryNorm
             0.53815156 = fieldWeight in 3299, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.610425 = idf(docFreq=21, maxDocs=44421)
               0.0625 = fieldNorm(doc=3299)
         0.03962897 = weight(abstract_txt:structure in 3299) [ClassicSimilarity], result of:
           0.03962897 = score(doc=3299,freq=1.0), product of:
             0.14549278 = queryWeight, product of:
               1.7025453 = boost
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.019608818 = queryNorm
             0.27237758 = fieldWeight in 3299, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.0625 = fieldNorm(doc=3299)
         0.04329361 = weight(abstract_txt:field in 3299) [ClassicSimilarity], result of:
           0.04329361 = score(doc=3299,freq=1.0), product of:
             0.15432943 = queryWeight, product of:
               1.7534862 = boost
               4.4884357 = idf(docFreq=1356, maxDocs=44421)
               0.019608818 = queryNorm
             0.28052723 = fieldWeight in 3299, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4884357 = idf(docFreq=1356, maxDocs=44421)
               0.0625 = fieldNorm(doc=3299)
         0.121849105 = weight(abstract_txt:classification in 3299) [ClassicSimilarity], result of:
           0.121849105 = score(doc=3299,freq=4.0), product of:
             0.24417683 = queryWeight, product of:
               3.119214 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019608818 = queryNorm
             0.49901992 = fieldWeight in 3299, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=3299)
       0.28 = coord(7/25)
   

3. Sparck Jones, K.: Some thoughts on classification for retrieval (2005) 0.13

   0.1329835 = sum of:
     0.1329835 = product of:
       0.55409795 = sum of:
         0.038991597 = weight(abstract_txt:objects in 5392) [ClassicSimilarity], result of:
           0.038991597 = score(doc=5392,freq=1.0), product of:
             0.11423616 = queryWeight, product of:
               1.0667552 = boost
               5.4611917 = idf(docFreq=512, maxDocs=44421)
               0.019608818 = queryNorm
             0.34132448 = fieldWeight in 5392, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4611917 = idf(docFreq=512, maxDocs=44421)
               0.0625 = fieldNorm(doc=5392)
         0.06940164 = weight(abstract_txt:class in 5392) [ClassicSimilarity], result of:
           0.06940164 = score(doc=5392,freq=2.0), product of:
             0.1331658 = queryWeight, product of:
               1.151753 = boost
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.019608818 = queryNorm
             0.5211671 = fieldWeight in 5392, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.0625 = fieldNorm(doc=5392)
         0.077669054 = weight(abstract_txt:classifications in 5392) [ClassicSimilarity], result of:
           0.077669054 = score(doc=5392,freq=2.0), product of:
             0.14354175 = queryWeight, product of:
               1.1957822 = boost
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.019608818 = queryNorm
             0.5410903 = fieldWeight in 5392, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.0625 = fieldNorm(doc=5392)
         0.10359464 = weight(abstract_txt:precise in 5392) [ClassicSimilarity], result of:
           0.10359464 = score(doc=5392,freq=2.0), product of:
             0.17392865 = queryWeight, product of:
               1.3162807 = boost
               6.738623 = idf(docFreq=142, maxDocs=44421)
               0.019608818 = queryNorm
             0.59561574 = fieldWeight in 5392, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.738623 = idf(docFreq=142, maxDocs=44421)
               0.0625 = fieldNorm(doc=5392)
         0.062377118 = weight(abstract_txt:natural in 5392) [ClassicSimilarity], result of:
           0.062377118 = score(doc=5392,freq=1.0), product of:
             0.19687161 = queryWeight, product of:
               1.9804757 = boost
               5.0694656 = idf(docFreq=758, maxDocs=44421)
               0.019608818 = queryNorm
             0.3168416 = fieldWeight in 5392, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0694656 = idf(docFreq=758, maxDocs=44421)
               0.0625 = fieldNorm(doc=5392)
         0.20206389 = weight(abstract_txt:classification in 5392) [ClassicSimilarity], result of:
           0.20206389 = score(doc=5392,freq=11.0), product of:
             0.24417683 = queryWeight, product of:
               3.119214 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019608818 = queryNorm
             0.8275309 = fieldWeight in 5392, product of:
               3.3166249 = tf(freq=11.0), with freq of:
                 11.0 = termFreq=11.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=5392)
       0.24 = coord(6/25)
   

4. Gnoli, C.; Pullman, T.; Cousson, P.; Merli, G.; Szostak, R.: Representing the structural elements of a freely faceted classification (2011) 0.13

   0.13022669 = sum of:
     0.13022669 = product of:
       0.5426112 = sum of:
         0.040150113 = weight(abstract_txt:structures in 825) [ClassicSimilarity], result of:
           0.040150113 = score(doc=825,freq=1.0), product of:
             0.10038622 = queryWeight, product of:
               5.1194425 = idf(docFreq=721, maxDocs=44421)
               0.019608818 = queryNorm
             0.39995643 = fieldWeight in 825, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1194425 = idf(docFreq=721, maxDocs=44421)
               0.078125 = fieldNorm(doc=825)
         0.06134296 = weight(abstract_txt:class in 825) [ClassicSimilarity], result of:
           0.06134296 = score(doc=825,freq=1.0), product of:
             0.1331658 = queryWeight, product of:
               1.151753 = boost
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.019608818 = queryNorm
             0.46065098 = fieldWeight in 825, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.078125 = fieldNorm(doc=825)
         0.068650395 = weight(abstract_txt:classifications in 825) [ClassicSimilarity], result of:
           0.068650395 = score(doc=825,freq=1.0), product of:
             0.14354175 = queryWeight, product of:
               1.1957822 = boost
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.019608818 = queryNorm
             0.4782608 = fieldWeight in 825, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.078125 = fieldNorm(doc=825)
         0.19102602 = weight(abstract_txt:subclasses in 825) [ClassicSimilarity], result of:
           0.19102602 = score(doc=825,freq=1.0), product of:
             0.28397357 = queryWeight, product of:
               1.6819068 = boost
               8.610425 = idf(docFreq=21, maxDocs=44421)
               0.019608818 = queryNorm
             0.67268944 = fieldWeight in 825, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.610425 = idf(docFreq=21, maxDocs=44421)
               0.078125 = fieldNorm(doc=825)
         0.049536213 = weight(abstract_txt:structure in 825) [ClassicSimilarity], result of:
           0.049536213 = score(doc=825,freq=1.0), product of:
             0.14549278 = queryWeight, product of:
               1.7025453 = boost
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.019608818 = queryNorm
             0.34047198 = fieldWeight in 825, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.078125 = fieldNorm(doc=825)
         0.13190551 = weight(abstract_txt:classification in 825) [ClassicSimilarity], result of:
           0.13190551 = score(doc=825,freq=3.0), product of:
             0.24417683 = queryWeight, product of:
               3.119214 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019608818 = queryNorm
             0.5402049 = fieldWeight in 825, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.078125 = fieldNorm(doc=825)
       0.24 = coord(6/25)
   

5. Sparck Jones, K.: Some thoughts on classification for retrieval (1970) 0.12

   0.12344454 = sum of:
     0.12344454 = product of:
       0.51435226 = sum of:
         0.038991597 = weight(abstract_txt:objects in 5327) [ClassicSimilarity], result of:
           0.038991597 = score(doc=5327,freq=1.0), product of:
             0.11423616 = queryWeight, product of:
               1.0667552 = boost
               5.4611917 = idf(docFreq=512, maxDocs=44421)
               0.019608818 = queryNorm
             0.34132448 = fieldWeight in 5327, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4611917 = idf(docFreq=512, maxDocs=44421)
               0.0625 = fieldNorm(doc=5327)
         0.06940164 = weight(abstract_txt:class in 5327) [ClassicSimilarity], result of:
           0.06940164 = score(doc=5327,freq=2.0), product of:
             0.1331658 = queryWeight, product of:
               1.151753 = boost
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.019608818 = queryNorm
             0.5211671 = fieldWeight in 5327, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.8963327 = idf(docFreq=331, maxDocs=44421)
               0.0625 = fieldNorm(doc=5327)
         0.077669054 = weight(abstract_txt:classifications in 5327) [ClassicSimilarity], result of:
           0.077669054 = score(doc=5327,freq=2.0), product of:
             0.14354175 = queryWeight, product of:
               1.1957822 = boost
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.019608818 = queryNorm
             0.5410903 = fieldWeight in 5327, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.121738 = idf(docFreq=264, maxDocs=44421)
               0.0625 = fieldNorm(doc=5327)
         0.07325248 = weight(abstract_txt:precise in 5327) [ClassicSimilarity], result of:
           0.07325248 = score(doc=5327,freq=1.0), product of:
             0.17392865 = queryWeight, product of:
               1.3162807 = boost
               6.738623 = idf(docFreq=142, maxDocs=44421)
               0.019608818 = queryNorm
             0.42116395 = fieldWeight in 5327, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.738623 = idf(docFreq=142, maxDocs=44421)
               0.0625 = fieldNorm(doc=5327)
         0.062377118 = weight(abstract_txt:natural in 5327) [ClassicSimilarity], result of:
           0.062377118 = score(doc=5327,freq=1.0), product of:
             0.19687161 = queryWeight, product of:
               1.9804757 = boost
               5.0694656 = idf(docFreq=758, maxDocs=44421)
               0.019608818 = queryNorm
             0.3168416 = fieldWeight in 5327, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0694656 = idf(docFreq=758, maxDocs=44421)
               0.0625 = fieldNorm(doc=5327)
         0.19266035 = weight(abstract_txt:classification in 5327) [ClassicSimilarity], result of:
           0.19266035 = score(doc=5327,freq=10.0), product of:
             0.24417683 = queryWeight, product of:
               3.119214 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019608818 = queryNorm
             0.78901976 = fieldWeight in 5327, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=5327)
       0.24 = coord(6/25)