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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 2598 eu6 2599 issettru 2838 issetlem 2840 rextru 3093 rexcom4b 3481 eueq 3666 ssrabeq 4032 nsspssun 4214 disjpss 4414 reusngf 4635 reuprg0 4663 reuprg 4664 pr1eqbg 4817 disjprg 5099 ax6vsep 5260 pwun 5548 dfid3 5553 elvv 5730 elvvv 5731 dfres3 5977 resopab 6030 xpcan2 6170 funfn 6564 dffn2 6705 dffn3 6716 dffn4 6796 fsn 7130 sucexb 7804 fparlem1 8110 ixp0x 8936 ac6sfi 9257 fiint 9299 rankc1 9855 cf0 10255 ind1a 12256 ccatrcan 14791 prmreclem2 17012 subislly 23710 ovoliunlem1 25733 plyun0 26425 dmcuts 28059 rightge0 28089 tgjustf 28817 ercgrg 28862 dfpth2 30196 0wlk 30589 0trl 30595 0pth 30598 0cycl 30607 nmoolb 31255 hlimreui 31723 nmoplb 32391 nmfnlb 32408 dmdbr5ati 32906 disjunsn 33070 esplyind 34088 fsumcvg4 34463 issibf 34847 bnj1174 35515 derang0 35751 subfacp1lem6 35767 satfdm 35951 bj-denoteslem 37617 bj-rexcom4bv 37628 bj-rexcom4b 37629 bj-tagex 37734 bj-dfid2ALT 37812 bj-restuni 37850 rdgeqoa 38127 ftc1anclem5 38449 disjressuc2 39162 eqvrelcoss3 39453 dfeldisj5 39564 dibord 42035 eu6w 43525 ifpnot 44313 ifpdfxor 44330 ifpid1g 44337 ifpim1g 44344 ifpimimb 44347 relopabVD 45726 n0abso 45802 euabsneu 47919 rmotru 49734 reutru 49735 |
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