cf.
confer 参见，参看
aka.
also known as 又叫做
w.r.t
with regard to 关于
building blocks 基础
We introduce here briefly a few important building blocks of convex optimization.
subdifferential
次微分
first-order optimality condition
一阶最优性条件
convex bounded below functions
下凸函数
to that end
为此
it follows that
因此