feat(Combinatorics/Graph): map on Graph

[Jun2M]

This PR introduces vertex map on graphs, map.

Co-authored-by: Peter Nelson apn.uni@gmail.com

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[github-actions]

PR summary f369f66ea0

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.Combinatorics.Graph.Maps (new file)	493

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Declarations diff

+ Adj.map
+ Inc.map
+ IsLink.map
+ IsLoopAt.map
+ IsSpanningSubgraph.map
+ IsSubgraph.map
+ map
+ map_adj
+ map_eq_of_eqOn
+ map_id
+ map_inc
+ map_isLoopAt
+ map_map

You can run this locally as follows

## summary with just the declaration names:
./scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh contains some details about this script.

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No changes to technical debt.

You can run this locally as

./scripts/reporting/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[YaelDillies]

Thanks!

maintainer delegate

[YaelDillies]

Suggested change

	lemma IsLink.map (f : α → α') (h : G.IsLink e u v) : (G.map f).IsLink e (f u) (f v) :=
	protected lemma IsLink.map (f : α → α') (h : G.IsLink e u v) : (G.map f).IsLink e (f u) (f v) :=

Same below

[github-actions]

🚀 Pull request has been placed on the maintainer queue by YaelDillies.