Wrong sigma for functions

[planetis-m]

peterroelants.github.io/_posts/2015-06-10-cross-entropy-softmax.html

Line 105 in 6ffce2c

. This softmax function $\varsigma$ takes as input a $C$-dimensional vector $\mathbf{z}$ and outputs a $C$-dimensional vector $\mathbf{y}$ of real values between $0$ and $1$. This function is a normalized exponential and is defined as:

Greek letter ς is only used as last letter in words that end with an s sound (weird rule I know). In math
to denote functions we use regular sigma σ (in mathml \sigma).