*ׁW&ъhwIݳxWW'b$@X&5ɼHE[JYDl"*v7&5̻s1UACb:=HN`ftiSDf" =W3Qß*G:Y?6ېυ\y9>N/_A6PExDN/z4Of\Zb]ѻO3e;<8vJ&`@S`dEi!YGOoVK!SR{ Ĉ}!e'aoO3 YENsSrۃüS wvS7K^ńyHJMeT2/,oM<1Ly2kY~O(4ꇳ@i,ϕjQiJ`=RUr6a ,2i}^vbծDƌBxXkwg>E)T193߲*54Ev J2w1(,ܚ1]FwHUވLL!wHv^f:ߚf)Y[NQnR><8PG^P3@yRY̓Y:^}k^}onG¶\j7k6'{jw$Z>O؋K~4˔OL"-+x<'1xspD.ΜCwp(j" nTH)Slq2L֩uL-Lmt:Ob+ &hdݗ^kJ`! HĔ/q(sD~9=&!{5XW#iA39b|uf37{ endstream endobj 13 0 obj << /Type /Page /Parent 3 0 R /Contents 14 0 R >> endobj 14 0 obj << /Length 3144 >> stream 0.000 0.000 0.000 rg BT 108.000 705.744 Td /F2 12.0 Tf [(The geometric problems presented are also classics. The first is whether a triangle )] TJ ET BT 72.000 687.924 Td /F2 12.0 Tf [(having two angles bisected by line segments of equal length must be an isosceles triangle. The )] TJ ET BT 72.000 670.104 Td /F2 12.0 Tf [(discussion then moves on to the euclidean theory that a straight line and a circle intersect at two )] TJ ET BT 72.000 652.284 Td /F2 12.0 Tf [(points. The latter may seem intuitively obvious, and readers are told that Euclid considered it so. )] TJ ET BT 72.000 634.464 Td /F2 12.0 Tf [(But the author is not satisfied until he can prove the case, and he does. His hand-drawn diagrams )] TJ ET BT 72.000 616.644 Td /F2 12.0 Tf [(add authenticity to his work and again demonstrate the simple beauty of pure, diligent )] TJ ET BT 72.000 598.824 Td /F2 12.0 Tf [(mathematical work.)] TJ ET BT 108.000 581.004 Td /F2 12.0 Tf [(The second section of the book begins with a look at partial permutations. The author )] TJ ET BT 72.000 563.184 Td /F2 12.0 Tf [(clearly lays out the main rules and then goes on to develop his own corollary to a conventional )] TJ ET BT 72.000 545.364 Td /F2 12.0 Tf [(permutations theorem, which he then applies to further expansions. More handwritten charts )] TJ ET BT 72.000 527.544 Td /F2 12.0 Tf [(appear, meticulously written and very readable.)] TJ ET BT 108.000 509.724 Td /F2 12.0 Tf [(There are a few typos in the text and a couple of other flaws, such as an occasional )] TJ ET BT 72.000 491.904 Td /F2 12.0 Tf [(missing word, none of which alters the books readability. Another round of editing would )] TJ ET BT 72.000 474.084 Td /F2 12.0 Tf [(eliminate these errors for a second edition. And, the reader should be warned that the word )] TJ ET BT 72.000 456.264 Td /F2 12.0 Tf [(nominator is used in place of numerator, a rare but not actually incorrect usage. The author )] TJ ET BT 72.000 438.444 Td /F2 12.0 Tf [(might consider altering the subtitle to include a reference to the first section of the book as well )] TJ ET BT 72.000 420.624 Td /F2 12.0 Tf [(as the second. Finally, an overall table of contents, rather than one just for each section, would )] TJ ET BT 72.000 402.804 Td /F2 12.0 Tf [(be helpful.)] TJ ET BT 108.000 384.984 Td /F2 12.0 Tf [(This is without doubt the work of an inspired man. Any math teacher, especially of )] TJ ET BT 72.000 367.164 Td /F2 12.0 Tf [(algebra \(heavily relied on in the first several problems\), geometry, or discrete mathematics )] TJ ET BT 72.000 349.344 Td /F2 12.0 Tf [(should have this thought-provoking book in his or her personal library and can recommend its )] TJ ET BT 72.000 331.524 Td /F2 12.0 Tf [(reading to students as preparation for some interesting class discussion. Additionally, instructors )] TJ ET BT 72.000 313.704 Td /F2 12.0 Tf [(of computer science might challenge their students to convert Dat Phung Tos work into ditigal )] TJ ET BT 72.000 295.884 Td /F2 12.0 Tf [(algorithms, just for the fun of it.)] TJ ET BT 458.328 278.064 Td /F3 12.0 Tf [(Patricia Morrow)] TJ ET endstream endobj xref 0 15 0000000000 65535 f 0000000008 00000 n 0000000073 00000 n 0000000119 00000 n 0000000339 00000 n 0000000376 00000 n 0000000490 00000 n 0000000553 00000 n 0000003618 00000 n 0000003726 00000 n 0000003835 00000 n 0000003946 00000 n 0000006494 00000 n 0000008939 00000 n 0000009004 00000 n trailer << /Size 15 /Root 1 0 R /Info 5 0 R >> startxref 12201 %%EOF