The other main change is Apple’s in-house networking chips are on board here. The N1 covers Wi-Fi 7, Bluetooth 6 and Thread, while the C1X handles cellular connectivity if you buy a 5G-capable model. Again, this doesn’t change the experience of using the iPad Air in any major way, but having the newest Wi-Fi and Bluetooth protocols on board is good for future usage, regardless of who built the chip. In my testing, the C1X on Verizon’s 5G network was extremely fast around the suburbs of Boston and didn’t seem any slower (or any faster) than other devices I have running on the same carrier. That’s fine, as other Apple devices I’ve tried with the C1X (like the iPad Pro) are solid and reliable, which is the most important thing.
The honest answer: because it shouldn’t work and has never been done before. TeX has no arrays, no functions with return values, no convenient local variables or stack frames, no integers bigger than 2^{31}-1, no bitwise operations. Macro expansion can recurse, but you get no call stack and deep recursion quickly hits engine limits. What TeX does have is a Turing-complete macro expansion engine and, with e-TeX extensions (used by modern pdfTeX), up to 32,768 integer registers called \count. That turns out to be just barely enough to implement a chess engine.
，这一点在新收录的资料中也有详细论述
Nature, Published online: 04 March 2026; doi:10.1038/s41586-026-10166-7，这一点在新收录的资料中也有详细论述
Last July, the UK introduced new laws for porn sites to "robustly" age-check users or risk fines of up to £18m, or 10% of worldwide revenue.，这一点在新收录的资料中也有详细论述