Document (#42659)

Author
Freistetter, F.
Title
Vollkommen logisch
Source
Spektrum der Wissenschaft. 2020, H.2, S.81
Year
2020
Series
Freistetters Formelwelt
Abstract
Das Internet steckt voller Informationen. Um aber diejenigen zu finden, die einen wirklich interessieren, braucht man gute Suchmaschinen - und die richtige Mathematik.
Theme
Suchmaschinen
Object
DeMorgan-Regeln

Similar documents (content)

  1. Klaiber, S.: Pfade durch den Dschungel (1996) 0.43
    0.42568842 = sum of:
      0.42568842 = product of:
        1.2061172 = sum of:
          0.03548043 = weight(abstract_txt:internet in 2880) [ClassicSimilarity], result of:
            0.03548043 = score(doc=2880,freq=1.0), product of:
              0.060899876 = queryWeight, product of:
                3.7286568 = idf(docFreq=2900, maxDocs=44421)
                0.016332926 = queryNorm
              0.5826026 = fieldWeight in 2880, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7286568 = idf(docFreq=2900, maxDocs=44421)
                0.15625 = fieldNorm(doc=2880)
          0.08441135 = weight(abstract_txt:informationen in 2880) [ClassicSimilarity], result of:
            0.08441135 = score(doc=2880,freq=1.0), product of:
              0.10853199 = queryWeight, product of:
                1.3349675 = boost
                4.9776354 = idf(docFreq=831, maxDocs=44421)
                0.016332926 = queryNorm
              0.7777555 = fieldWeight in 2880, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9776354 = idf(docFreq=831, maxDocs=44421)
                0.15625 = fieldNorm(doc=2880)
          0.12264036 = weight(abstract_txt:finden in 2880) [ClassicSimilarity], result of:
            0.12264036 = score(doc=2880,freq=1.0), product of:
              0.13922358 = queryWeight, product of:
                1.5119874 = boost
                5.6376824 = idf(docFreq=429, maxDocs=44421)
                0.016332926 = queryNorm
              0.88088787 = fieldWeight in 2880, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6376824 = idf(docFreq=429, maxDocs=44421)
                0.15625 = fieldNorm(doc=2880)
          0.22222853 = weight(abstract_txt:wirklich in 2880) [ClassicSimilarity], result of:
            0.22222853 = score(doc=2880,freq=1.0), product of:
              0.20693013 = queryWeight, product of:
                1.8433324 = boost
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.016332926 = queryNorm
              1.0739303 = fieldWeight in 2880, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.15625 = fieldNorm(doc=2880)
          0.28173327 = weight(abstract_txt:braucht in 2880) [ClassicSimilarity], result of:
            0.28173327 = score(doc=2880,freq=1.0), product of:
              0.2423907 = queryWeight, product of:
                1.9950316 = boost
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.016332926 = queryNorm
              1.1623106 = fieldWeight in 2880, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.15625 = fieldNorm(doc=2880)
          0.4596232 = weight(abstract_txt:voller in 2880) [ClassicSimilarity], result of:
            0.4596232 = score(doc=2880,freq=1.0), product of:
              0.33591172 = queryWeight, product of:
                2.3485746 = boost
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.016332926 = queryNorm
              1.3682857 = fieldWeight in 2880, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.15625 = fieldNorm(doc=2880)
        0.3529412 = coord(6/17)
    
  2. Ganslmayer, K.: Per Mausklick zum Wissen der Welt : Chip Test & Technik: Lexika Online vs. Offline (2005) 0.17
    0.171468 = sum of:
      0.171468 = product of:
        0.41642228 = sum of:
          0.014192171 = weight(abstract_txt:internet in 4996) [ClassicSimilarity], result of:
            0.014192171 = score(doc=4996,freq=1.0), product of:
              0.060899876 = queryWeight, product of:
                3.7286568 = idf(docFreq=2900, maxDocs=44421)
                0.016332926 = queryNorm
              0.23304105 = fieldWeight in 4996, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7286568 = idf(docFreq=2900, maxDocs=44421)
                0.0625 = fieldNorm(doc=4996)
          0.037241235 = weight(abstract_txt:aber in 4996) [ClassicSimilarity], result of:
            0.037241235 = score(doc=4996,freq=2.0), product of:
              0.09195808 = queryWeight, product of:
                1.2288157 = boost
                4.581832 = idf(docFreq=1235, maxDocs=44421)
                0.016332926 = queryNorm
              0.40498054 = fieldWeight in 4996, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.581832 = idf(docFreq=1235, maxDocs=44421)
                0.0625 = fieldNorm(doc=4996)
          0.058481902 = weight(abstract_txt:informationen in 4996) [ClassicSimilarity], result of:
            0.058481902 = score(doc=4996,freq=3.0), product of:
              0.10853199 = queryWeight, product of:
                1.3349675 = boost
                4.9776354 = idf(docFreq=831, maxDocs=44421)
                0.016332926 = queryNorm
              0.5388448 = fieldWeight in 4996, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.9776354 = idf(docFreq=831, maxDocs=44421)
                0.0625 = fieldNorm(doc=4996)
          0.049056143 = weight(abstract_txt:finden in 4996) [ClassicSimilarity], result of:
            0.049056143 = score(doc=4996,freq=1.0), product of:
              0.13922358 = queryWeight, product of:
                1.5119874 = boost
                5.6376824 = idf(docFreq=429, maxDocs=44421)
                0.016332926 = queryNorm
              0.35235515 = fieldWeight in 4996, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6376824 = idf(docFreq=429, maxDocs=44421)
                0.0625 = fieldNorm(doc=4996)
          0.0558661 = weight(abstract_txt:suchmaschinen in 4996) [ClassicSimilarity], result of:
            0.0558661 = score(doc=4996,freq=1.0), product of:
              0.15182714 = queryWeight, product of:
                1.5789431 = boost
                5.887337 = idf(docFreq=334, maxDocs=44421)
                0.016332926 = queryNorm
              0.36795858 = fieldWeight in 4996, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.887337 = idf(docFreq=334, maxDocs=44421)
                0.0625 = fieldNorm(doc=4996)
          0.08889141 = weight(abstract_txt:wirklich in 4996) [ClassicSimilarity], result of:
            0.08889141 = score(doc=4996,freq=1.0), product of:
              0.20693013 = queryWeight, product of:
                1.8433324 = boost
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.016332926 = queryNorm
              0.4295721 = fieldWeight in 4996, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.0625 = fieldNorm(doc=4996)
          0.11269332 = weight(abstract_txt:braucht in 4996) [ClassicSimilarity], result of:
            0.11269332 = score(doc=4996,freq=1.0), product of:
              0.2423907 = queryWeight, product of:
                1.9950316 = boost
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.016332926 = queryNorm
              0.46492425 = fieldWeight in 4996, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.0625 = fieldNorm(doc=4996)
        0.4117647 = coord(7/17)
    
  3. Freistetter, F.: Ist gleich immer gleich gleich? (2022) 0.15
    0.14663893 = sum of:
      0.14663893 = product of:
        0.83095396 = sum of:
          0.10533412 = weight(abstract_txt:aber in 1907) [ClassicSimilarity], result of:
            0.10533412 = score(doc=1907,freq=1.0), product of:
              0.09195808 = queryWeight, product of:
                1.2288157 = boost
                4.581832 = idf(docFreq=1235, maxDocs=44421)
                0.016332926 = queryNorm
              1.145458 = fieldWeight in 1907, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.581832 = idf(docFreq=1235, maxDocs=44421)
                0.25 = fieldNorm(doc=1907)
          0.35556564 = weight(abstract_txt:wirklich in 1907) [ClassicSimilarity], result of:
            0.35556564 = score(doc=1907,freq=1.0), product of:
              0.20693013 = queryWeight, product of:
                1.8433324 = boost
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.016332926 = queryNorm
              1.7182884 = fieldWeight in 1907, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.25 = fieldNorm(doc=1907)
          0.37005416 = weight(abstract_txt:mathematik in 1907) [ClassicSimilarity], result of:
            0.37005416 = score(doc=1907,freq=1.0), product of:
              0.21251392 = queryWeight, product of:
                1.8680371 = boost
                6.965269 = idf(docFreq=113, maxDocs=44421)
                0.016332926 = queryNorm
              1.7413173 = fieldWeight in 1907, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.965269 = idf(docFreq=113, maxDocs=44421)
                0.25 = fieldNorm(doc=1907)
        0.1764706 = coord(3/17)
    
  4. Delahaye, J.-P.: PI: Die Story (1999) 0.15
    0.14542575 = sum of:
      0.14542575 = product of:
        0.49444753 = sum of:
          0.044162672 = weight(abstract_txt:aber in 2705) [ClassicSimilarity], result of:
            0.044162672 = score(doc=2705,freq=5.0), product of:
              0.09195808 = queryWeight, product of:
                1.2288157 = boost
                4.581832 = idf(docFreq=1235, maxDocs=44421)
                0.016332926 = queryNorm
              0.48024786 = fieldWeight in 2705, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.581832 = idf(docFreq=1235, maxDocs=44421)
                0.046875 = fieldNorm(doc=2705)
          0.06666856 = weight(abstract_txt:wirklich in 2705) [ClassicSimilarity], result of:
            0.06666856 = score(doc=2705,freq=1.0), product of:
              0.20693013 = queryWeight, product of:
                1.8433324 = boost
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.016332926 = queryNorm
              0.32217908 = fieldWeight in 2705, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.046875 = fieldNorm(doc=2705)
          0.09812543 = weight(abstract_txt:mathematik in 2705) [ClassicSimilarity], result of:
            0.09812543 = score(doc=2705,freq=2.0), product of:
              0.21251392 = queryWeight, product of:
                1.8680371 = boost
                6.965269 = idf(docFreq=113, maxDocs=44421)
                0.016332926 = queryNorm
              0.46173647 = fieldWeight in 2705, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.965269 = idf(docFreq=113, maxDocs=44421)
                0.046875 = fieldNorm(doc=2705)
          0.08451999 = weight(abstract_txt:braucht in 2705) [ClassicSimilarity], result of:
            0.08451999 = score(doc=2705,freq=1.0), product of:
              0.2423907 = queryWeight, product of:
                1.9950316 = boost
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.016332926 = queryNorm
              0.3486932 = fieldWeight in 2705, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.046875 = fieldNorm(doc=2705)
          0.20097087 = weight(abstract_txt:steckt in 2705) [ClassicSimilarity], result of:
            0.20097087 = score(doc=2705,freq=3.0), product of:
              0.2994043 = queryWeight, product of:
                2.2172813 = boost
                8.267481 = idf(docFreq=30, maxDocs=44421)
                0.016332926 = queryNorm
              0.6712358 = fieldWeight in 2705, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                8.267481 = idf(docFreq=30, maxDocs=44421)
                0.046875 = fieldNorm(doc=2705)
        0.29411766 = coord(5/17)
    
  5. Stoll, C.: LogOut : Warum Computer nichts im Klassenzimmer zu suchen haben und andere High-Tech-Ketzereien (2002) 0.14
    0.14113659 = sum of:
      0.14113659 = product of:
        0.47986436 = sum of:
          0.025088452 = weight(abstract_txt:internet in 2401) [ClassicSimilarity], result of:
            0.025088452 = score(doc=2401,freq=2.0), product of:
              0.060899876 = queryWeight, product of:
                3.7286568 = idf(docFreq=2900, maxDocs=44421)
                0.016332926 = queryNorm
              0.41196227 = fieldWeight in 2401, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.7286568 = idf(docFreq=2900, maxDocs=44421)
                0.078125 = fieldNorm(doc=2401)
          0.02651388 = weight(abstract_txt:einen in 2401) [ClassicSimilarity], result of:
            0.02651388 = score(doc=2401,freq=1.0), product of:
              0.079608485 = queryWeight, product of:
                1.1433296 = boost
                4.263084 = idf(docFreq=1699, maxDocs=44421)
                0.016332926 = queryNorm
              0.33305344 = fieldWeight in 2401, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.263084 = idf(docFreq=1699, maxDocs=44421)
                0.078125 = fieldNorm(doc=2401)
          0.1571393 = weight(abstract_txt:wirklich in 2401) [ClassicSimilarity], result of:
            0.1571393 = score(doc=2401,freq=2.0), product of:
              0.20693013 = queryWeight, product of:
                1.8433324 = boost
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.016332926 = queryNorm
              0.7593834 = fieldWeight in 2401, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.8731537 = idf(docFreq=124, maxDocs=44421)
                0.078125 = fieldNorm(doc=2401)
          0.13025609 = weight(abstract_txt:gute in 2401) [ClassicSimilarity], result of:
            0.13025609 = score(doc=2401,freq=1.0), product of:
              0.23006074 = queryWeight, product of:
                1.9436276 = boost
                7.2471204 = idf(docFreq=85, maxDocs=44421)
                0.016332926 = queryNorm
              0.5661813 = fieldWeight in 2401, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.2471204 = idf(docFreq=85, maxDocs=44421)
                0.078125 = fieldNorm(doc=2401)
          0.14086664 = weight(abstract_txt:braucht in 2401) [ClassicSimilarity], result of:
            0.14086664 = score(doc=2401,freq=1.0), product of:
              0.2423907 = queryWeight, product of:
                1.9950316 = boost
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.016332926 = queryNorm
              0.5811553 = fieldWeight in 2401, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.438788 = idf(docFreq=70, maxDocs=44421)
                0.078125 = fieldNorm(doc=2401)
        0.29411766 = coord(5/17)