of course this rabbit hole goes deeper, and we have a paper using this technique for string constraint solving that i’d love to derail this post into, but i’ll save that for another time. the main point is that symbolic derivatives are a more powerful and efficient generalization of Brzozowski’s original idea, and they form the core of the new RE# engine. fun fact: symbolic derivatives are also implemented in Z3 (the SMT solver) for its sequence theory - so in some sense we’re inching closer to having an SMT solver’s core machinery inside a regex engine.
With our product(s), we make informed bets on market fundamentals. We then use customer feedback to keep making those products better.
。pg电子官网是该领域的重要参考
success rate (500 runs)，详情可参考谷歌
The issue at hand? Lawyers for the plaintiff are arguing that Sony is taking advantage of its "monopoly position" by forcing gamers to buy digital games solely through its PlayStation Store. The suit also claims Sony forced gamers to pay 'unfair download fees'.
Once you've read everything, the second step is to forget it all.