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| Mirrors > Home > ILE Home > Th. List > iftruei | GIF version | ||
| Description: Inference associated with iftrue 3645. (Contributed by BJ, 7-Oct-2018.) |
| Ref | Expression |
|---|---|
| iftruei.1 | ⊢ 𝜑 |
| Ref | Expression |
|---|---|
| iftruei | ⊢ if(𝜑, 𝐴, 𝐵) = 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iftruei.1 | . 2 ⊢ 𝜑 | |
| 2 | iftrue 3645 | . 2 ⊢ (𝜑 → if(𝜑, 𝐴, 𝐵) = 𝐴) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ if(𝜑, 𝐴, 𝐵) = 𝐴 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 ifcif 3638 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in2 624 ax-io 721 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-if 3639 |
| This theorem is used by: ctmlemr 7448 xnegpnf 10240 xnegmnf 10241 xaddpnf1 10258 xaddpnf2 10259 xaddmnf1 10260 xaddmnf2 10261 pnfaddmnf 10262 mnfaddpnf 10263 iseqf1olemqk 10957 exp0 10993 swrd00g 11435 sumsnf 12192 prodsnf 12375 lcm0val 12859 ennnfonelemj0 13341 ennnfonelem0 13345 mulg0 13977 lgs0 16230 lgs2 16234 2lgs2 16319 1loopgrvd2fi 16644 eupth2fi 16818 peano3nninf 17148 dceqnconst 17208 |
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