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Theorem sumeq12si 36145
Description: Equality inference for sum. General version of sumeq2si 36144. (Contributed by GG, 1-Sep-2025.)
Hypotheses
Ref Expression
sumeq12si.1 𝐴 = 𝐵
sumeq12si.2 𝐶 = 𝐷
Assertion
Ref Expression
sumeq12si Σ𝑥𝐴 𝐶 = Σ𝑥𝐵 𝐷

Proof of Theorem sumeq12si
StepHypRef Expression
1 sumeq12si.1 . . 3 𝐴 = 𝐵
21sumeq1i 15720 . 2 Σ𝑥𝐴 𝐶 = Σ𝑥𝐵 𝐶
3 sumeq12si.2 . . 3 𝐶 = 𝐷
43sumeq2si 36144 . 2 Σ𝑥𝐵 𝐶 = Σ𝑥𝐵 𝐷
52, 4eqtri 2761 1 Σ𝑥𝐴 𝐶 = Σ𝑥𝐵 𝐷
Colors of variables: wff setvar class
Syntax hints:   = wceq 1535  Σcsu 15709
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1963  ax-7 2003  ax-8 2106  ax-9 2114  ax-ext 2704
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1087  df-tru 1538  df-fal 1548  df-ex 1775  df-sb 2061  df-clab 2711  df-cleq 2725  df-clel 2812  df-ral 3058  df-rex 3067  df-rab 3433  df-v 3479  df-sbc 3792  df-csb 3909  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4916  df-br 5151  df-opab 5213  df-mpt 5234  df-xp 5690  df-cnv 5692  df-co 5693  df-dm 5694  df-rn 5695  df-res 5696  df-ima 5697  df-pred 6318  df-iota 6511  df-f 6563  df-f1 6564  df-fo 6565  df-f1o 6566  df-fv 6567  df-ov 7429  df-oprab 7430  df-mpo 7431  df-frecs 8300  df-wrecs 8331  df-recs 8405  df-rdg 8444  df-seq 14030  df-sum 15710
This theorem is referenced by: (None)
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