She dove into market research and invested about $40,000 to launch her pasta-and-sauce brand Sausly.
"Women Preferences was created because women asked for it," the company wrote in a March 9 blog post.
。PDF资料对此有专业解读
Often people write these metrics as \(ds^2 = \sum_{i,j} g_{ij}\,dx^i\,dx^j\), where each \(dx^i\) is a covector (1-form), i.e. an element of the dual space \(T_p^*M\). For finite dimensional vectorspaces there is a canonical isomorphism between them and their dual: given the coordinate basis \(\bigl\{\frac{\partial}{\partial x^1},\dots,\frac{\partial}{\partial x^n}\bigr\}\) of \(T_pM\), there is a unique dual basis \(\{dx^1,\dots,dx^n\}\) of \(T_p^*M\) defined by \[dx^i\!\left(\frac{\partial}{\partial x^j}\right) = \delta^i{}_j.\] This extends to isomorphisms \(T_pM \to T_p^*M\). Under this identification, the bilinear form \(g_p\) on \(T_pM \times T_pM\) is represented by the symmetric tensor \(\sum_{i,j} g_{ij}\,dx^i \otimes dx^j\) acting on pairs of tangent vectors via \[\left(\sum_{i,j} g_{ij}\,dx^i\otimes dx^j\right)\!\!\left(\frac{\partial}{\partial x^k},\frac{\partial}{\partial x^l}\right) = g_{kl},\] which recovers exactly the inner products \(g_p\!\left(\frac{\partial}{\partial x^k},\frac{\partial}{\partial x^l}\right)\) from before. So both descriptions carry identical information;
The quest for a cancer cure dates back thousands of years. Some of the earliest known research dates to ancient Egypt, where Imhotep, the physician and architect to King Djoser, described a human tumor on papyrus around 2600 B.C.。业内人士推荐新收录的资料作为进阶阅读
for await (const chunks of input) {
Calls kmap() to map that frame into the kernel’s virtual address space as writable.。新收录的资料对此有专业解读