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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 3020 | . 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 2956 |
| 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 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2753 df-ne 2957 |
| This theorem is used by: eqnetrri 3027 notsep 5325 2on0 8484 1n0 8488 1n0OLD 8489 snnen2o 9229 noinfep 9654 card1 10042 fin23lem31 10414 s1nz 14747 bpoly4 16218 tan0 16312 nn0rppwr 16728 basendxnmulrndx 17460 plusgndxnmulrndx 17461 slotsbhcdif 17579 xrsnsgrp 21707 pzriprnglem4 21783 ustuqtop1 24553 iaa 26644 iaaOLD 26645 tan4thpi 26836 ang180lem2 27131 mcubic 27168 quart1lem 27176 flt0 27962 flt4lem5e 27979 nogt01o 28046 slotsinbpsd 28896 slotslnbpsd 28897 ex-lcm 31052 9p10ne21 31064 cos9thpiminplylem5 34411 esumnul 34673 ballotth 35163 quad3 36414 bj-1upln0 37902 bj-2upln0 37916 bj-2upln1upl 37917 tan3rdpi 43383 sn-0ne2 43437 mncn0 44125 aaitgo 44148 stirlinglem11 47063 cjnpoly 47908 pgnbgreunbgrlem4 49186 sec0 50822 2p2ne5 50905 |
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