For the Poincaré half-space model in dimension 2, the metric evaluates on the coordinate tangent vectors \(\frac{\partial}{\partial x}, \frac{\partial}{\partial y} \in T_pM\) as \[g_p\!\left(\frac{\partial}{\partial x^i}\bigg|_p,\;\frac{\partial}{\partial x^j}\bigg|_p\right) = \frac{1}{y^2}\,\delta_{ij},\] i.e. the coordinate tangent vectors are orthogonal and each has length \(\frac{1}{y}\) — shrinking to zero as \(p\) approaches the boundary \(y\to 0\), which is what makes the space “infinitely large” near the boundary.
Fortunately for repairability, Micron came up with LPCAMM2, a modular memory format that is as fast, and as power-efficient, as soldered memory. It also takes up less space on the board. This isn’t to argue that Apple should switch to LPCAMM (although it should), but that it could give its M-series chips user-replaceable RAM without sacrificing speed, if only it cared to.。新收录的资料对此有专业解读
。新收录的资料对此有专业解读
How to watch it: Stream it on Netflix。新收录的资料是该领域的重要参考
Books Referenced