updated number of chi-2-gam

Author: lfkdlfdlk

P/chi-2-gam.md

@@ -16,7 +16,7 @@ theorem: "Relationship between gamma and chi-squared distribution"
 
 sources:
 
-proof_id: "P171"
+proof_id: "P174"
 shortcut: "chi-2-gam"
 username: "kjpetrykowski"
 ---
@@ -37,4 +37,4 @@ $$
 { \mathrm{Gam}(x; \frac{k}{2}, \frac{1}{2}) = \frac{x ^ {\frac{k}{2} - 1} e ^ {-x / 2}}{\Gamma(k / 2) 2 ^ {k / 2}} = {\frac {1}{2^{k/2}\Gamma (k/2)}}\;x^{k/2-1}e^{-x/2}\;} 
 $$\
 
-which is equivalent to the [probability density function of the chi-square distribution](/D/chi-2).
+which is equivalent to the [probability density function of the chi-square distribution](/D/chi-2).