Theorem cosseqd 38426

Description: Equality theorem for the classes of cosets by 𝐴 and 𝐵, deduction form. (Contributed by Peter Mazsa, 4-Nov-2019.)

Hypothesis

Ref	Expression
cosseqd.1	⊢ (𝜑 → 𝐴 = 𝐵)

Assertion

Ref	Expression
cosseqd	⊢ (𝜑 → ≀ 𝐴 = ≀ 𝐵)

Proof of Theorem cosseqd

Step	Hyp	Ref	Expression
1		cosseqd.1	. 2 ⊢ (𝜑 → 𝐴 = 𝐵)
2		cosseq 38424	. 2 ⊢ (𝐴 = 𝐵 → ≀ 𝐴 = ≀ 𝐵)
3	1, 2	syl 17	1 ⊢ (𝜑 → ≀ 𝐴 = ≀ 𝐵)

Syntax hints:   → wi 4   = wceq 1540   ≀ ccoss 38176

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2702

This theorem depends on definitions:  df-bi 207  df-an 396  df-ex 1780  df-sb 2066  df-clab 2709  df-cleq 2722  df-clel 2804  df-br 5111  df-opab 5173  df-coss 38409

This theorem is referenced by:  relbrcoss  38444  elcoeleqvrels  38593  releldmqscoss  38659  eldisjs  38721