leanprover-community / leanprover-community/mathlib4
Create `BilinearMap` abbreviation
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Description
In a recent PR #10238 it was suggested that mathlib should have a namespace for bilinear maps and add an abbrev BilinearMap := M →ₛₗ[ρ₁₂] N →ₛₗ[σ₁₂] P in order to support dot-notation.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the suggested change in PR #10238 and locate the existing definitions for the relevant semilinear maps in mathlib. Add the bilinear-map namespace and abbreviation described in this issue, then verify that the resulting API supports the intended dot notation.
Written by the indexing model from the issue text.
Assessment
- Domain
- api
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100