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Mirrors > Home > MPE Home > Th. List > infeq1 | Structured version Visualization version GIF version |
Description: Equality theorem for infimum. (Contributed by AV, 2-Sep-2020.) |
Ref | Expression |
---|---|
infeq1 | ⊢ (𝐵 = 𝐶 → inf(𝐵, 𝐴, 𝑅) = inf(𝐶, 𝐴, 𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | supeq1 8893 | . 2 ⊢ (𝐵 = 𝐶 → sup(𝐵, 𝐴, ◡𝑅) = sup(𝐶, 𝐴, ◡𝑅)) | |
2 | df-inf 8891 | . 2 ⊢ inf(𝐵, 𝐴, 𝑅) = sup(𝐵, 𝐴, ◡𝑅) | |
3 | df-inf 8891 | . 2 ⊢ inf(𝐶, 𝐴, 𝑅) = sup(𝐶, 𝐴, ◡𝑅) | |
4 | 1, 2, 3 | 3eqtr4g 2858 | 1 ⊢ (𝐵 = 𝐶 → inf(𝐵, 𝐴, 𝑅) = inf(𝐶, 𝐴, 𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1538 ◡ccnv 5518 supcsup 8888 infcinf 8889 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-in 3888 df-ss 3898 df-uni 4801 df-sup 8890 df-inf 8891 |
This theorem is referenced by: infeq1d 8925 infeq1i 8926 ramcl2lem 16335 odfval 18652 odval 18654 submod 18686 ioorval 24178 uniioombllem6 24192 infleinf 42004 infxrpnf 42084 prproropf1olem2 44021 prproropf1olem3 44022 prproropf1olem4 44023 prproropf1o 44024 prproropreud 44026 |
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