beta reduction|Beta reduction in lambda calculus using Haskell : iloilo I am extremely confused about this one. Given the following rule ("Type and Programming Languages", Benjamin Pierce, page 72):
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beta reduction,
2.5) Eta Conversion/Eta Reduction - This is special case reduction, which I only call half a process, because it's kinda Beta Reduction, kinda, as in technichally it's not. You may see it written on wikipedia or in a textbook as "Eta-conversion converts between λx.(f x) and f whenever x does not appear free in f", which sounds really confusing.
(λw. w) (λu. λv. u) (λu. λv. v) (λu. λv. u) Apply (λw. w) to (λu. λv. u). As this is the identity function, nothing changes.beta reduction Beta reduction in lambda calculus using Haskell (λw. w) (λu. λv. u) (λu. λv. v) (λu. λv. u) Apply (λw. w) to (λu. λv. u). As this is the identity function, nothing changes. I think what you're hitting upon is the difference between a strictly-evaluated lambda calculus (your reduction steps) and a lazily-evaluated lambda calculus (the book's reduction steps). – hao Commented Aug 10, 2016 at 18:13
So, beta-reduction in the (untyped) lambda calculus is what we call a confluent rewrite rule. This means if you can rewrite A to B with beta reduction, and also rewrite A to C with beta-reduction, then you can find some D such that B rewrites to D and C rewrites to D - there will be, in effect, some common descendent. Lambda calculus beta reduction specific steps and why. 2. Beta reduction of some lambda. 0. I am extremely confused about this one. Given the following rule ("Type and Programming Languages", Benjamin Pierce, page 72): I have defined the following functions for beta reduction but i'm not sure how to consider the case where free variables get bounded. data Term = Variable Char | Lambda Char Term | Pair Term Term
I am trying to reduce the following using beta reduction: (λx.x x) (λx. λy.x x) I am getting stuck after the first substitution since it seems to be giving (λx. λy.x x)(λx. λy.x x) which would end in kind of a loop. What am I doing wrong?
Beta reduction in lambda calculus using Haskell I am trying to reduce the following using beta reduction: (λx.x x) (λx. λy.x x) I am getting stuck after the first substitution since it seems to be giving (λx. λy.x x)(λx. λy.x x) which would end in kind of a loop. What am I doing wrong?
beta reduction|Beta reduction in lambda calculus using Haskell
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