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| Mirrors > Home > MPE Home > Th. List > biantru | Structured version Visualization version GIF version | ||
| Description: A wff is equivalent to its conjunction with truth. (Contributed by NM, 26-May-1993.) |
| Ref | Expression |
|---|---|
| biantru.1 | ⊢ 𝜑 |
| Ref | Expression |
|---|---|
| biantru | ⊢ (𝜓 ↔ (𝜓 ∧ 𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biantru.1 | . 2 ⊢ 𝜑 | |
| 2 | iba 537 | . 2 ⊢ (𝜑 → (𝜓 ↔ (𝜓 ∧ 𝜑))) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝜓 ↔ (𝜓 ∧ 𝜑)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This proof depends on definitions: df-bi 210 df-an 402 |
| This theorem is used by: biantrur 540 pm4.71 567 eu6lem 2604 eu6 2605 issettru 2844 issetlem 2846 rextru 3099 rexcom4b 3489 eueq 3674 ssrabeq 4041 nsspssun 4224 disjpss 4424 reusngf 4645 reuprg0 4673 reuprg 4674 pr1eqbg 4827 disjprg 5110 ax6vsep 5271 pwun 5559 dfid3 5564 elvv 5741 elvvv 5742 dfres3 5988 resopab 6041 xpcan2 6180 funfn 6573 dffn2 6714 dffn3 6725 dffn4 6805 fsn 7138 sucexb 7812 fparlem1 8116 ixp0x 8933 ac6sfi 9254 fiint 9296 rankc1 9852 cf0 10252 ind1a 12247 ccatrcan 14780 prmreclem2 17002 subislly 23675 ovoliunlem1 25698 plyun0 26391 dmcuts 28021 rightge0 28051 tgjustf 28779 ercgrg 28823 dfpth2 30115 0wlk 30504 0trl 30510 0pth 30513 0cycl 30522 nmoolb 31160 hlimreui 31628 nmoplb 32296 nmfnlb 32313 dmdbr5ati 32811 disjunsn 32976 esplyind 33996 fsumcvg4 34371 issibf 34754 bnj1174 35422 derang0 35681 subfacp1lem6 35697 satfdm 35881 bj-denoteslem 37546 bj-rexcom4bv 37557 bj-rexcom4b 37558 bj-tagex 37663 bj-dfid2ALT 37741 bj-restuni 37779 rdgeqoa 38056 ftc1anclem5 38388 disjressuc2 39100 eqvrelcoss3 39391 dfeldisj5 39502 dibord 41973 eu6w 43448 ifpnot 44236 ifpdfxor 44253 ifpid1g 44260 ifpim1g 44267 ifpimimb 44270 relopabVD 45649 n0abso 45725 euabsneu 47805 rmotru 49621 reutru 49622 |
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