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| Mirrors > Home > ILE Home > Th. List > 3brtr3d | GIF version | ||
| Description: Substitution of equality into both sides of a binary relation. (Contributed by NM, 18-Oct-1999.) |
| Ref | Expression |
|---|---|
| 3brtr3d.1 | ⊢ (𝜑 → 𝐴𝑅𝐵) |
| 3brtr3d.2 | ⊢ (𝜑 → 𝐴 = 𝐶) |
| 3brtr3d.3 | ⊢ (𝜑 → 𝐵 = 𝐷) |
| Ref | Expression |
|---|---|
| 3brtr3d | ⊢ (𝜑 → 𝐶𝑅𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3brtr3d.1 | . 2 ⊢ (𝜑 → 𝐴𝑅𝐵) | |
| 2 | 3brtr3d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | 3brtr3d.3 | . . 3 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 2, 3 | breq12d 4144 | . 2 ⊢ (𝜑 → (𝐴𝑅𝐵 ↔ 𝐶𝑅𝐷)) |
| 5 | 1, 4 | mpbid 147 | 1 ⊢ (𝜑 → 𝐶𝑅𝐷) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 class class class wbr 4131 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 df-sn 3715 df-pr 3716 df-op 3718 df-br 4132 |
| This theorem is used by: ofrval 6317 phplem2 7160 ltaddnq 7781 prarloclemarch2 7793 prmuloclemcalc 7939 axcaucvglemcau 8272 apreap 8924 ltmul1 8929 divap1d 9140 div2subap 9176 lemul2a 9198 mul2lt0rlt0 10177 xleadd2a 10293 monoord2 10944 expubnd 11054 bernneq2 11120 nn0ltexp2 11169 apexp1 11178 resqrexlemcalc2 11803 resqrexlemcalc3 11804 abs2dif2 11896 bdtrilem 12030 bdtri 12031 xrmaxaddlem 12051 fsum00 12254 iserabs 12267 geosergap 12298 mertenslemi1 12327 eftlub 12482 eirraplem 12569 bitscmp 12750 unitmulcl 14529 unitgrp 14532 xblss2 15664 xmstri2 15729 mstri2 15730 xmstri 15731 mstri 15732 xmstri3 15733 mstri3 15734 msrtri 15735 logdivlti 16144 ppiqp1le 16300 ppiqeq0 16313 chtublem 16328 chtqub 16329 perfectlem2 16333 bposlem9 16352 2sqlem8 16480 apdifflemr 17336 |
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