1. 线性无关 Independence
Suppose A is m by n with m<n (more unknowns than equations)
Then there are nonzero solutions to Ax0
Reason: there will be free variables! A中具有至少一个自由变量,那么Ax0一定具有非零解。A的列向量可以线性组合得到零向…
本文开始介绍googletest/googletest/sample/sample5_unittest.cc 有关TEST_F测试夹具的使用案例
class QuickTest : public testing::Test {protected:// Remember that SetUp() is run immediately before a test starts.// This is a good place to record the start time.v…