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| Mirrors > Home > MPE Home > Th. List > eqnetri | Structured version Visualization version GIF version | ||
| Description: Substitution of equal classes into an inequality. (Contributed by NM, 4-Jul-2012.) |
| Ref | Expression |
|---|---|
| eqnetr.1 | ⊢ 𝐴 = 𝐵 |
| eqnetr.2 | ⊢ 𝐵 ≠ 𝐶 |
| Ref | Expression |
|---|---|
| eqnetri | ⊢ 𝐴 ≠ 𝐶 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqnetr.2 | . 2 ⊢ 𝐵 ≠ 𝐶 | |
| 2 | eqnetr.1 | . . 3 ⊢ 𝐴 = 𝐵 | |
| 3 | 2 | neeq1i 3019 | . 2 ⊢ (𝐴 ≠ 𝐶 ↔ 𝐵 ≠ 𝐶) |
| 4 | 1, 3 | mpbir 234 | 1 ⊢ 𝐴 ≠ 𝐶 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ≠ wne 2955 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1812 df-cleq 2752 df-ne 2956 |
| This theorem is used by: eqnetrri 3026 notsep 5325 2on0 8498 1n0 8502 1n0OLD 8503 snnen2o 9243 noinfep 9668 card1 10056 fin23lem31 10428 s1nz 14761 bpoly4 16234 tan0 16328 nn0rppwr 16744 basendxnmulrndx 17476 plusgndxnmulrndx 17477 slotsbhcdif 17595 xrsnsgrp 21723 pzriprnglem4 21799 ustuqtop1 24569 iaa 26660 iaaOLD 26661 tan4thpi 26852 ang180lem2 27147 mcubic 27184 quart1lem 27192 flt0 27978 nogt01o 28062 slotsinbpsd 28912 slotslnbpsd 28913 ex-lcm 31068 9p10ne21 31080 cos9thpiminplylem5 34468 esumnul 34730 ballotth 35220 quad3 36525 bj-1upln0 38018 bj-2upln0 38032 bj-2upln1upl 38033 tan3rdpi 43512 sn-0ne2 43566 mncn0 44250 aaitgo 44273 stirlinglem11 47202 cjnpoly 48047 pgnbgreunbgrlem4 49325 fuconuniqlem 50889 sec0 51036 2p2ne5 51119 |
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