| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 2m1e1 | GIF version | ||
| Description: 2 - 1 = 1. The result is on the right-hand-side to be consistent with similar proofs like 4p4e8 9453. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9378 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8273 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9424 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8617 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 (class class class)co 6085 1c1 8181 − cmin 8499 2c2 9358 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 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-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-setind 4684 ax-resscn 8272 ax-1cn 8273 ax-1re 8274 ax-icn 8275 ax-addcl 8276 ax-addrcl 8277 ax-mulcl 8278 ax-addcom 8280 ax-addass 8282 ax-distr 8284 ax-i2m1 8285 ax-0id 8288 ax-rnegex 8289 ax-cnre 8291 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-sub 8501 df-2 9366 |
| This theorem is used by: 1e2m1 9426 1mhlfehlf 9528 subhalfhalf 9545 addltmul 9547 xp1d2m1eqxm1d2 9563 nn0lt2 9732 nn0le2is012 9733 zeo 9756 fzo0to2pr 10647 bcn2 11217 maxabslemlub 11989 geo2sum2 12300 ege2le3 12456 cos2tsin 12536 cos12dec 12553 odd2np1 12658 oddp1even 12661 mod2eq1n2dvds 12664 oddge22np1 12666 prmdiv 13035 ballotfilem2 13279 hoverb 15801 sin0pilem1 15935 cos2pi 15958 cosq34lt1 16004 log2ublem3 16145 ppiprm 16181 ppinprm 16182 chtprm 16183 chtnprm 16184 chtublem 16217 chtqub 16218 lgslem4 16244 gausslemma2dlem1a 16299 lgseisenlem1 16311 2lgslem3c 16336 clwwlkn2 16784 clwwlkext2edg 16785 ex-fl 16861 |
| Copyright terms: Public domain | W3C validator |