Theorem sumeq12sdv 36578

Description: Equality deduction for sum. General version of sumeq2sdv 15731. (Contributed by GG, 1-Sep-2025.)

Hypotheses

Ref	Expression
sumeq12sdv.1	⊢ (𝜑 → 𝐴 = 𝐵)
sumeq12sdv.2	⊢ (𝜑 → 𝐶 = 𝐷)

Assertion

Ref	Expression
sumeq12sdv	⊢ (𝜑 → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 𝐷)

Distinct variable group:   𝜑,𝑘

Allowed substitution hints:   𝐴(𝑘)   𝐵(𝑘)   𝐶(𝑘)   𝐷(𝑘)

Proof of Theorem sumeq12sdv

Step	Hyp	Ref	Expression
1		sumeq12sdv.1	. . 3 ⊢ (𝜑 → 𝐴 = 𝐵)
2	1	sumeq1d 15728	. 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 𝐶)
3		sumeq12sdv.2	. . 3 ⊢ (𝜑 → 𝐶 = 𝐷)
4	3	sumeq2sdv 15731	. 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝐵 𝐶 = Σ𝑘 ∈ 𝐵 𝐷)
5	2, 4	eqtrd 2798	1 ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 𝐷)

Syntax hints:   → wi 4   = wceq 1561  Σcsu 15714

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1816  ax-4 1830  ax-5 1931  ax-6 1988  ax-7 2029  ax-8 2145  ax-9 2153  ax-ext 2735

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1101  df-tru 1564  df-fal 1574  df-ex 1801  df-sb 2092  df-clab 2742  df-cleq 2755  df-clel 2838  df-ral 3078  df-rex 3088  df-rab 3416  df-v 3457  df-sbc 3746  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4482  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5102  df-opab 5164  df-mpt 5183  df-xp 5654  df-cnv 5656  df-co 5657  df-dm 5658  df-rn 5659  df-res 5660  df-ima 5661  df-pred 6289  df-iota 6478  df-f 6526  df-f1 6527  df-fo 6528  df-f1o 6529  df-fv 6530  df-ov 7400  df-oprab 7401  df-mpo 7402  df-frecs 8263  df-wrecs 8294  df-recs 8343  df-rdg 8382  df-seq 14016  df-sum 15715

This theorem is referenced by: (None)