Sigma has announced a second-generation version of its full-frame 35mm F1.2 'Art' lens, after teasing that it was coming ...

Image: Sigma Sigma has announced pricing and availability for the AF Cine Line 28-45mm T2 FF, its first autofocus cinema lens for full-frame cameras, which it teased earlier this year. The lens is ...

This leads directly to the explicit solution of the initial value problem for the Somos 5 sequences in terms of the Weierstrass sigma function for an associated elliptic curve.

Extracytoplasmic function (ECF) sigma factors are a distinct subset of sigma factors that enable bacteria to respond robustly to a myriad of environmental challenges.