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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 3024 | . 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 2960 |
| 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 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2757 df-ne 2961 |
| This theorem is used by: eqnetrri 3031 notsep 5336 2on0 8470 1n0 8474 1n0OLD 8475 snnen2o 9208 noinfep 9632 card1 9966 fin23lem31 10338 s1nz 14660 bpoly4 16131 tan0 16225 nn0rppwr 16637 basendxnmulrndx 17367 plusgndxnmulrndx 17368 slotsbhcdif 17486 xrsnsgrp 21588 pzriprnglem4 21664 ustuqtop1 24429 iaa 26519 tan4thpi 26710 tan4thpiOLD 26711 ang180lem2 27006 mcubic 27043 quart1lem 27051 nogt01o 27891 slotsinbpsd 28741 slotslnbpsd 28742 ex-lcm 30856 9p10ne21 30868 cos9thpiminplylem5 34216 esumnul 34478 ballotth 34969 quad3 36175 bj-1upln0 37678 bj-2upln0 37692 bj-2upln1upl 37693 tan3rdpi 43146 sn-0ne2 43200 flt0 43402 flt4lem5e 43421 mncn0 43899 aaitgo 43922 stirlinglem11 46831 cjnpoly 47659 pgnbgreunbgrlem4 48917 sec0 50571 2p2ne5 50651 |
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