ISR11 Information Analysis and Dictionary Construction chapter G. Salton M. E. Lesk Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. Iv-70 Case 1 5ynOfl3TmO[OCRerr]5 te[OCRerr]ns v1 = ( 3, 0, 0, 5, 1, 0 = ( 2, 0, 1, 5, 2, 0 [OCRerr](2, 0, 0, 5, = [OCRerr](3, 0, 0, 1, 0) 8 5, 1, 0) 9 [OCRerr]2, 0, 0, 5, C _ - 31 [OCRerr](2, 0, 1, 1, 0) 8 5, 2, 0) 10 Assuming cut-off K [OCRerr] [OCRerr]. Case 2 unrelated terms v1 = ( 3, 0[OCRerr] 0, [OCRerr]` 0) = ( 0, 1, 3, 0,1, 0) ... = 1 C.. 1 -13 [OCRerr] -31 [OCRerr] and C.. > K 31 For cut-off K = 0.7[OCRerr]c.. and %. [OCRerr] <K 13 Case 3 term i is a parent of term j _ = ( 3, 0, 0, 5, 1, 0 _ = ( 1, 0, 1, 3, 2, 0 ... = 6 -13 9 c.. =6 -31 - 7 Here c..<K and C.. >K[OCRerr]term i isparentof j -13 -13 Sample Automatic Hierarch[OCRerr] Formation Fig. 22