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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 1570 ≠ wne 2955 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-9 2155 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2752 df-ne 2956 |
| This theorem is used by: eqnetrri 3026 notsep 5328 2on0 8470 1n0 8474 1n0OLD 8475 snnen2o 9215 noinfep 9639 card1 9973 fin23lem31 10345 s1nz 14674 bpoly4 16145 tan0 16239 nn0rppwr 16651 basendxnmulrndx 17381 plusgndxnmulrndx 17382 slotsbhcdif 17500 xrsnsgrp 21621 pzriprnglem4 21697 ustuqtop1 24467 iaa 26560 iaaOLD 26561 tan4thpi 26752 ang180lem2 27047 mcubic 27084 quart1lem 27092 nogt01o 27932 slotsinbpsd 28782 slotslnbpsd 28783 ex-lcm 30938 9p10ne21 30950 cos9thpiminplylem5 34296 esumnul 34558 ballotth 35049 quad3 36249 bj-1upln0 37753 bj-2upln0 37767 bj-2upln1upl 37768 tan3rdpi 43227 sn-0ne2 43281 flt0 43483 flt4lem5e 43502 mncn0 43980 aaitgo 44003 stirlinglem11 46912 cjnpoly 47757 pgnbgreunbgrlem4 49035 sec0 50686 2p2ne5 50769 |
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