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Mirrors > Home > MPE Home > Th. List > neirr | Structured version Visualization version GIF version |
Description: No class is unequal to itself. Inequality is irreflexive. (Contributed by Stefan O'Rear, 1-Jan-2015.) |
Ref | Expression |
---|---|
neirr | ⊢ ¬ 𝐴 ≠ 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2610 | . 2 ⊢ 𝐴 = 𝐴 | |
2 | nne 2786 | . 2 ⊢ (¬ 𝐴 ≠ 𝐴 ↔ 𝐴 = 𝐴) | |
3 | 1, 2 | mpbir 220 | 1 ⊢ ¬ 𝐴 ≠ 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 = wceq 1475 ≠ wne 2780 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-cleq 2603 df-ne 2782 |
This theorem is referenced by: neldifsn 4262 ac5b 9183 1nuz2 11640 dprd2da 18264 dvlog 24197 legso 25294 hleqnid 25303 umgrnloop0 25775 usgranloop0 25909 frgra2v 26526 0ngrp 26749 signswch 29964 signstfvneq0 29975 linedegen 31420 prtlem400 33173 padd01 34115 padd02 34116 fiiuncl 38259 usgrnloop0ALT 40432 nfrgr2v 41442 rmsupp0 41943 lcoc0 42005 ssdifsn 42228 |
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