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docs: More doc strings

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jstoobysmith 2024-11-12 05:49:43 +00:00
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HepLean/Mathematics/PiTensorProduct.lean
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@ -154,11 +154,15 @@ lemma induction_mod_tmul
# Dependent type version of PiTensorProduct.tmulEquiv
-/
/-- Given two maps `s1` and `s2` whose targets carry an instance of an addative commutative
monoid, the target of the sum of these two maps also carry an instance thereof. -/
instance : (i : ι1 ⊕ ι2) → AddCommMonoid ((fun i => Sum.elim s1 s2 i) i) := fun i =>
match i with
| Sum.inl i => inst1 i
| Sum.inr i => inst2 i
/-- Given two maps `s1` and `s2` whose targets carry an instance of a module over `R`,
the target of the sum of these two maps also carry an instance thereof. -/
instance : (i : ι1 ⊕ ι2) → Module R ((fun i => Sum.elim s1 s2 i) i) := fun i =>
match i with
| Sum.inl i => inst1' i