Symbol in context

$f_k$

This entry links every published equation using this exact notation. Its meaning may change between equations.

Meanings in context

Article-grounded definition

the fraction of it that survives step k.

C_n = C_0 \prod_{k=1}^{n} f_k + \sum_{k=1}^{n} i_k \prod_{j=k+1}^{n} f_j

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

f_k

the fraction of it that survives step k.