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| Mirrors > Home > ILE Home > Th. List > ineq2d | GIF version | ||
| Description: Equality deduction for intersection of two classes. (Contributed by NM, 10-Apr-1994.) |
| Ref | Expression |
|---|---|
| ineq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| ineq2d | ⊢ (𝜑 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ineq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | ineq2 3402 | . 2 ⊢ (𝐴 = 𝐵 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ∩ cin 3199 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-in 3206 |
| This theorem is referenced by: disjpr2 3733 rint0 3967 riin0 4042 disji2 4080 xpriindim 4868 riinint 4993 reseq2 5008 csbresg 5016 resindm 5055 isoselem 5961 zfz1isolem1 11105 fsumm1 11995 bitsinv1 12541 ennnfonelemhf1o 13052 nninfdclemcl 13087 nninfdclemp1 13089 nninfdc 13092 ressvalsets 13165 ressbasd 13168 ressinbasd 13175 ressressg 13176 restval 13346 mgpress 13963 subrngpropd 14249 subrgpropd 14286 crng2idl 14564 basis1 14790 baspartn 14793 eltg 14795 tgdom 14815 ntrval 14853 resttopon2 14921 restopnb 14924 qtopbasss 15264 p1evtxdeqfilem 16181 |
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