f (x) = c xc-1e-λx / x≥0 gamma distribution λ Γ(c), λ) f (x) = xk/2-1e-x/2 / ( 2k/2 Γ(k/2) chi-square χ 2(k) distribution ) F (k1, k2) F distribution (k) Bin(n,p) binomial distribution f = nCk pk(1-p)n-k Poisson(λ) f (k) = / k! Poisson distribution λke-λ geometric Geom(p) f (k) = p(1-p) k distribution hyper-geometric HG(N,K,n) distribution Bern(p) Bernoulli distribution Combinatorics Symbols Symbol Symbol Name Meaning / definition Example n! n! = 1⋅2⋅3⋅...⋅n 5! = 1⋅2⋅3⋅4⋅5 = 120 nPk 5P3 = 5! / (5-3)! = 60 permutation nCk 5C3 = 5!/[3!(5-3)!]=10 combination Logic symbols Symbol Symbol Name Meaning / definition Example and and x y ^ caret / circumflex and x ^ y
λ) gamma distribution f (x) = λ c xc-1e-λx / Γ(c), x≥0 χ 2(k) chi-square distribution f (x) = xk/2-1e-x/2 / ( 2k/2 Γ(k/2) ) F (k1, k2) F distribution Bin(n,p) binomial distribution f (k) = nCk pk(1-p)n-k Poisson(λ) Poisson distribution f (k) = λke-λ / k! Geom(p) geometric distribution f (k) = p(1-p) k HG(N,K,n) hyper-geometric distribution Bern(p) Bernoulli distribution Combinatorics Symbols Symbol Symbol Name Meaning / definition Example n! n! = 1⋅2⋅3⋅...⋅n 5! = 1⋅2⋅3⋅4⋅5 = 120 nPk permutation 5P3 = 5! / (5-3)! = 60 nCk combination 5C3 = 5!/[3!(5-3)!]=10 Logic symbols Symbol Symbol Name Meaning / definition Example and and x y ^ caret / circumflex and x ^ y
basic_math_symbols.docx