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- logic: unification of a formula - Mathematics Stack Exchange
The Unification Algorithm is described at page 84 You have to recall the resolution calculus [page 29] : Resolution is a simple syntactic transformation applied to formulas From two given formulas in a resolution step (provided resolution is applicable to the formulas), a third formula is generated
- Unification of an expression : Example - Mathematics Stack Exchange
Unification of an expression : Example Ask Question Asked 4 years, 10 months ago Modified 4 years, 10 months ago
- What is How to do Unification - Mathematics Stack Exchange
3 There is no unification in either case, since whatever you substitute for x x (and perhaps a a; you didn't state which symbols are variables to be substituted), the first expression of the pair will have P P as its outermost symbol and the second one will have Q Q
- The Langlands program for beginners - Mathematics Stack Exchange
@ABC, Langlands isn't really a grand unified theory of mathematics - that's just something Edward Frenkel said to convey the importance of the work to convey the importance of the program to the interested non-expert If there is a grand unified theory of mathematics, it's probably (higher) category theory, or something related to that, perhaps the Curry-Howard isomorphism or some deeper
- elementary set theory - Prove that the union of countably many . . .
I am doing some homework exercises and stumbled upon this question I don't know where to start Prove that the union of countably many countable sets is countable Just reading it confuses me
- Equation of a 3D spiral - Mathematics Stack Exchange
I want to know if a 3D spiral, that looks like this: can be approximated to any sort of geometric primitive that can be described with a known equation, like some sort of twisted cylinder I suppose
- Why should faithfully flat descent preserve so many properties?
Incidentally, a faithfully flat morphism is "conservative": pull-back along it reflects isomorphisms This is at least an explanation for faithfully flat descent (from the point of view of the Barr-Beck theorem, conservativity is the crucial part of the explanation for descent-type results), and maybe it's "morally" why pull-back along a faithfully flat, quasi-compact morphism "reflects" a
- Is there a unified description of the geometric derivative?
The geometric derivative seems like it should offer further unification, because, at least for vectors, it combines the interior and exterior derivatives into one But the question is, how can I describe the meaning of the geometric derivative without resorting to describing each component separately?
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