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Mirrors > Home > MPE Home > Th. List > Mathboxes > aecoms-o | Structured version Visualization version GIF version |
Description: A commutation rule for identical variable specifiers. Version of aecoms 2450 using ax-c11 36025. (Contributed by NM, 10-May-1993.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
alequcoms-o.1 | ⊢ (∀𝑥 𝑥 = 𝑦 → 𝜑) |
Ref | Expression |
---|---|
aecoms-o | ⊢ (∀𝑦 𝑦 = 𝑥 → 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | aecom-o 36039 | . 2 ⊢ (∀𝑦 𝑦 = 𝑥 → ∀𝑥 𝑥 = 𝑦) | |
2 | alequcoms-o.1 | . 2 ⊢ (∀𝑥 𝑥 = 𝑦 → 𝜑) | |
3 | 1, 2 | syl 17 | 1 ⊢ (∀𝑦 𝑦 = 𝑥 → 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∀wal 1535 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-c5 36021 ax-c4 36022 ax-c7 36023 ax-c10 36024 ax-c11 36025 ax-c9 36028 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 |
This theorem is referenced by: hbae-o 36041 dral1-o 36042 dvelimf-o 36067 aev-o 36069 ax12indalem 36083 ax12inda2ALT 36084 |
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