Theorem ecqmap2 38954

Description: Fiber of QMap equals singleton quotient: a conceptual bridge between "map fibers" and quotients. (Contributed by Peter Mazsa, 19-Feb-2026.)

Assertion

Ref	Expression
ecqmap2	⊢ (𝐴 ∈ dom 𝑅 → [𝐴] QMap 𝑅 = ({𝐴} / 𝑅))

Proof of Theorem ecqmap2

Step	Hyp	Ref	Expression
1		ecqmap 38953	. 2 ⊢ (𝐴 ∈ dom 𝑅 → [𝐴] QMap 𝑅 = {[𝐴]𝑅})
2		snecg 8761	. 2 ⊢ (𝐴 ∈ dom 𝑅 → {[𝐴]𝑅} = ({𝐴} / 𝑅))
3	1, 2	eqtrd 2799	1 ⊢ (𝐴 ∈ dom 𝑅 → [𝐴] QMap 𝑅 = ({𝐴} / 𝑅))

Syntax hints:   → wi 4   = wceq 1562   ∈ wcel 2144  {csn 4584  dom cdm 5649  [cec 8678   / cqs 8679   QMap cqmap 38679

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1817  ax-4 1831  ax-5 1932  ax-6 1989  ax-7 2030  ax-8 2146  ax-9 2154  ax-11 2193  ax-ext 2736  ax-sep 5248  ax-pr 5392

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1101  df-tru 1565  df-fal 1575  df-ex 1802  df-sb 2093  df-clab 2743  df-cleq 2756  df-clel 2839  df-ral 3079  df-rex 3089  df-rab 3417  df-v 3458  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-br 5103  df-opab 5165  df-mpt 5184  df-xp 5655  df-cnv 5657  df-dm 5659  df-rn 5660  df-res 5661  df-ima 5662  df-ec 8682  df-qs 8686  df-qmap 38950

This theorem is referenced by: (None)