*** Triunghiul lui Catalan
*** Probleme: 'permutari4':problema/permutari4, 'colors':problema/colors
** Teorema lui Lucas

** Teorema lui Wilson

*** Probleme: 'showroom':problema/showroom, 'jap2':problema/jap2
** Teorema lui Wilson:
*** 'E-maxx':http://e-maxx.ru/algo/modular_factorial
*** Probleme: 'jap2':problema/jap2

** 'Numerele lui Stirling':problema/stirling
*** Problemele: 'ex':problema/ex, 'xnumere':problema/xnumere
** 'Identitatile Hockey-stick si a lui Vandermonde':http://artofproblemsolving.com/wiki/index.php/Combinatorial_identity

* Probabilitati
** '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
** 'Ballot theorem':https://goo.gl/6kQZ8l

** Markov chains
*** Probleme: 'Humpty Dumpty':http://acm.timus.ru/problem.aspx?space=1&num=1766, 'Random Run':http://codeforces.com/problemset/gymProblem/101081/B

* 'Principiul includerii si excluderii':principiul-includerii-si-excluderii

** Probleme: 'cowfood':problema/cowfood, 'indep':problema/indep, 'frac':problema/frac, 'CF 451E':http://codeforces.com/contest/451/problem/E, 'light2':problema/light2, 'trickortreat':problema/trickortreat

** Probleme: 'cowfood':problema/cowfood, 'indep':problema/indep, 'frac':problema/frac, 'CF 451E':http://codeforces.com/contest/451/problem/E, 'light2':problema/light2, 'trickortreat':problema/trickortreat
* '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
* '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