Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > ofreq | Structured version Visualization version GIF version |
Description: Equality theorem for function relation. (Contributed by Mario Carneiro, 28-Jul-2014.) |
Ref | Expression |
---|---|
ofreq | ⊢ (𝑅 = 𝑆 → ∘𝑟 𝑅 = ∘𝑟 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq 4655 | . . . 4 ⊢ (𝑅 = 𝑆 → ((𝑓‘𝑥)𝑅(𝑔‘𝑥) ↔ (𝑓‘𝑥)𝑆(𝑔‘𝑥))) | |
2 | 1 | ralbidv 2986 | . . 3 ⊢ (𝑅 = 𝑆 → (∀𝑥 ∈ (dom 𝑓 ∩ dom 𝑔)(𝑓‘𝑥)𝑅(𝑔‘𝑥) ↔ ∀𝑥 ∈ (dom 𝑓 ∩ dom 𝑔)(𝑓‘𝑥)𝑆(𝑔‘𝑥))) |
3 | 2 | opabbidv 4716 | . 2 ⊢ (𝑅 = 𝑆 → {〈𝑓, 𝑔〉 ∣ ∀𝑥 ∈ (dom 𝑓 ∩ dom 𝑔)(𝑓‘𝑥)𝑅(𝑔‘𝑥)} = {〈𝑓, 𝑔〉 ∣ ∀𝑥 ∈ (dom 𝑓 ∩ dom 𝑔)(𝑓‘𝑥)𝑆(𝑔‘𝑥)}) |
4 | df-ofr 6898 | . 2 ⊢ ∘𝑟 𝑅 = {〈𝑓, 𝑔〉 ∣ ∀𝑥 ∈ (dom 𝑓 ∩ dom 𝑔)(𝑓‘𝑥)𝑅(𝑔‘𝑥)} | |
5 | df-ofr 6898 | . 2 ⊢ ∘𝑟 𝑆 = {〈𝑓, 𝑔〉 ∣ ∀𝑥 ∈ (dom 𝑓 ∩ dom 𝑔)(𝑓‘𝑥)𝑆(𝑔‘𝑥)} | |
6 | 3, 4, 5 | 3eqtr4g 2681 | 1 ⊢ (𝑅 = 𝑆 → ∘𝑟 𝑅 = ∘𝑟 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1483 ∀wral 2912 ∩ cin 3573 class class class wbr 4653 {copab 4712 dom cdm 5114 ‘cfv 5888 ∘𝑟 cofr 6896 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-ral 2917 df-br 4654 df-opab 4713 df-ofr 6898 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |