** Reprezentanti in clase de echivalenta
*** Problemele: 'salaj':problema/salaj, 'Bracket Subsequences':http://codeforces.com/gym/100221, 'DSUBSEQ':http://www.spoj.com/problems/DSUBSEQ/
* 'Mobius Function':https://www.quora.com/profile/Surya-Kiran/Posts/A-Dance-with-Mobius-Function

* Baze de numeratie
** Probleme: 'NumberOfPaths':problema/nop, 'copii2':problema/copii2, 'psychtraining':problema/psychtraining, 'zimeria':problema/zimeria, 'incantatii':problema/incantatii, 'sticle':problema/sticle

* Probabilitati
** 'Teorema lui Bayes':https://en.wikipedia.org/wiki/Bayes%27_theorem
** 'Expected value':https://en.wikipedia.org/wiki/Expected_value: 'Tequila':problema/tequila, 'Sms':problema/sms, 'Expected Velea':problema/expected, 'Albume':problema/albume, 'Diapazon':problema/diapazon

* 'Lema lui Abel':https://en.wikipedia.org/wiki/Summation_by_parts
** Probleme: 'Power of Power Partition Function':http://opencup.ru/files/och/gp11/problems1-e.pdf
* 'Taylor series':https://en.wikipedia.org/wiki/Taylor_series

* 'Generating Functions':https://en.wikipedia.org/wiki/Generating_function

* 'Formal power series':https://en.wikipedia.org/wiki/Formal_power_series
** 'Generating Functions':https://en.wikipedia.org/wiki/Generating_function

* 'Interpolare polinoame':https://en.wikipedia.org/wiki/Lagrange_polynomial
** Problema: 'puteri3':problema/puteri3, 'The Sum of the k-th Powers':http://codeforces.com/contest/622/problem/F
* 'Metoda lui Newton':https://goo.gl/jfZbup

** Probleme: 'beri':problema/beri, 'toys':problema/toys
* 'Cautare ternara':https://en.wikipedia.org/wiki/Ternary_search
** Probmele: 'rubarba':problema/rubarba

* Baze de numeratie
** Probleme: 'NumberOfPaths':problema/nop, 'copii2':problema/copii2, 'psychtraining':problema/psychtraining, 'zimeria':problema/zimeria, 'incantatii':problema/incantatii, 'sticle':problema/sticle

* Smenul lui Mars
** Probleme: 'geamuri':problema/geamuri, 'ben':problema/ben, 'plaja':problema/paja, 'sahara':problema/sahara