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Mirrors > Home > MPE Home > Th. List > 3netr3d | Structured version Visualization version GIF version |
Description: Substitution of equality into both sides of an inequality. (Contributed by NM, 24-Jul-2012.) (Proof shortened by Wolf Lammen, 19-Nov-2019.) |
Ref | Expression |
---|---|
3netr3d.1 | ⊢ (𝜑 → 𝐴 ≠ 𝐵) |
3netr3d.2 | ⊢ (𝜑 → 𝐴 = 𝐶) |
3netr3d.3 | ⊢ (𝜑 → 𝐵 = 𝐷) |
Ref | Expression |
---|---|
3netr3d | ⊢ (𝜑 → 𝐶 ≠ 𝐷) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3netr3d.2 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
2 | 3netr3d.1 | . . 3 ⊢ (𝜑 → 𝐴 ≠ 𝐵) | |
3 | 3netr3d.3 | . . 3 ⊢ (𝜑 → 𝐵 = 𝐷) | |
4 | 2, 3 | neeqtrd 2851 | . 2 ⊢ (𝜑 → 𝐴 ≠ 𝐷) |
5 | 1, 4 | eqnetrrd 2850 | 1 ⊢ (𝜑 → 𝐶 ≠ 𝐷) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = 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-4 1728 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-cleq 2603 df-ne 2782 |
This theorem is referenced by: subrgnzr 19089 clmopfne 22704 dchrisum0re 25002 cdlemg9a 34938 cdlemg11aq 34944 cdlemg12b 34950 cdlemg12 34956 cdlemg13 34958 cdlemg19 34990 cdlemk3 35139 cdlemk12 35156 cdlemk12u 35178 lclkrlem2g 35820 mapdncol 35977 mapdpglem29 36007 hdmaprnlem1N 36159 hdmap14lem9 36186 pellex 36417 |
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