安然提出了问题
2019-12-31 10:30
基函数 $$ l_{0}(t)=left{begin{array}{cols} frac{t-t_{1}}{t_{0}-t_{1}} & t_{0}leq tleq t_{1}\ 0 & other end{array}right. $$ 我这样写报错。错误显示：Illegal character in array arg. ^^Il_{0}(t)=left{begin{arra...