| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > eqsstrdi | GIF version | ||
| Description: A chained subclass and equality deduction. (Contributed by Mario Carneiro, 2-Jan-2017.) |
| Ref | Expression |
|---|---|
| eqsstrdi.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| eqsstrdi.2 | ⊢ 𝐵 ⊆ 𝐶 |
| Ref | Expression |
|---|---|
| eqsstrdi | ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqsstrdi.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | eqsstrdi.2 | . . 3 ⊢ 𝐵 ⊆ 𝐶 | |
| 3 | 2 | a1i 9 | . 2 ⊢ (𝜑 → 𝐵 ⊆ 𝐶) |
| 4 | 1, 3 | eqsstrd 3284 | 1 ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ⊆ wss 3220 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 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-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 |
| This theorem is used by: eqsstrrdi 3301 resasplitss 5569 fimacnv 5837 suppssdmg 6489 en2other2 7548 exmidfodomrlemim 7553 pw1on 7585 suplocexprlemex 8089 fzowrddc 11419 swrdlend 11430 1arith 13146 ennnfonelemkh 13303 aprap 14598 znf1o 14986 mplbasss 15087 toponsspwpwg 15123 ntrss2 15222 cnprcl2k 15307 reldvg 15780 uhgrspansubgr 16518 trlsex 16628 bj-nntrans 16977 nninfsellemsuc 17055 |
| Copyright terms: Public domain | W3C validator |