Documentation

Mathlib.Tactic.FunProp.Theorems

fun_prop environment extensions storing theorems for fun_prop #

Tag for one of the 5 basic lambda theorems, that also hold extra data for composition theorem

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    Tag for one of the 5 basic lambda theorems

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      Decides whether f is a function corresponding to one of the lambda theorems.

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        Structure holding information about lambda theorem.

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          Collection of lambda theorems

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            Return proof of lambda theorem

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              Environment extension storing all lambda theorems.

              Get lambda theorems for particular function property funPropName.

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                Function theorems are stated in uncurried or compositional form.

                uncurried

                theorem Continuous_add : Continuous (fun x => x.1 + x.2)
                

                compositional

                theorem Continuous_add (hf : Continuous f) (hg : Continuous g) : Continuous (fun x => (f x) + (g x))
                
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                  TheoremForm to string

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                  theorem about specific function (either declared constant or free variable)

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                        General theorem about function property used for transition and morphism theorems

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                          There are four types of theorems:

                          • lam - theorem about basic lambda calculus terms
                          • function - theorem about a specific function(declared or free variable) in specific arguments
                          • mor - special theorems talking about bundled morphisms/DFunLike.coe
                          • transition - theorems inferring one function property from another

                          Examples:

                          • lam
                            theorem Continuous_id : Continuous fun x => x
                            theorem Continuous_comp (hf : Continuous f) (hg : Continuous g) : Continuous fun x => f (g x)
                          
                          • function
                            theorem Continuous_add : Continuous (fun x => x.1 + x.2)
                            theorem Continuous_add (hf : Continuous f) (hg : Continuous g) :
                                Continuous (fun x => (f x) + (g x))
                          
                          • mor - the head of function body has to be ``DFunLike.code
                            theorem ContDiff.clm_apply {f : E → F →L[𝕜] G} {g : E → F}
                                (hf : ContDiff 𝕜 n f) (hg : ContDiff 𝕜 n g) :
                                ContDiff 𝕜 n fun x => (f x) (g x)
                            theorem clm_linear {f : E →L[𝕜] F} : IsLinearMap 𝕜 f
                          
                          • transition - the conclusion has to be in the form P f where f is a free variable
                            theorem linear_is_continuous [FiniteDimensional ℝ E] {f : E → F} (hf : IsLinearMap 𝕜 f) :
                                Continuous f
                          
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                            For a theorem declaration declName return fun_prop theorem. It correctly detects which type of theorem it is.

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                              Register theorem declName with fun_prop.

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