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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 7159 ltaddnq 7781 prarloclemarch2 7793 prmuloclemcalc 7939 axcaucvglemcau 8272 apreap 8924 ltmul1 8929 divap1d 9140 div2subap 9176 lemul2a 9198 mul2lt0rlt0 10178 xleadd2a 10294 monoord2 10945 expubnd 11055 bernneq2 11121 nn0ltexp2 11170 apexp1 11179 resqrexlemcalc2 11804 resqrexlemcalc3 11805 abs2dif2 11897 bdtrilem 12031 bdtri 12032 xrmaxaddlem 12052 fsum00 12255 iserabs 12268 geosergap 12299 mertenslemi1 12328 eftlub 12483 eirraplem 12570 bitscmp 12751 unitmulcl 14530 unitgrp 14533 xblss2 15643 xmstri2 15708 mstri2 15709 xmstri 15710 mstri 15711 xmstri3 15712 mstri3 15713 msrtri 15714 logdivlti 16123 ppiqp1le 16279 ppiqeq0 16292 chtublem 16307 chtqub 16308 perfectlem2 16312 bposlem9 16331 2sqlem8 16459 apdifflemr 17315 |
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