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| 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 9382. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9307 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8219 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9353 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8561 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6049 1c1 8127 − cmin 8443 2c2 9287 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-setind 4658 ax-resscn 8218 ax-1cn 8219 ax-1re 8220 ax-icn 8221 ax-addcl 8222 ax-addrcl 8223 ax-mulcl 8224 ax-addcom 8226 ax-addass 8228 ax-distr 8230 ax-i2m1 8231 ax-0id 8234 ax-rnegex 8235 ax-cnre 8237 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2814 df-sbc 3042 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-br 4109 df-opab 4171 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-iota 5311 df-fun 5353 df-fv 5359 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-sub 8445 df-2 9295 |
| This theorem is referenced by: 1e2m1 9355 1mhlfehlf 9455 subhalfhalf 9472 addltmul 9474 xp1d2m1eqxm1d2 9490 nn0lt2 9658 nn0le2is012 9659 zeo 9682 fzo0to2pr 10562 bcn2 11125 maxabslemlub 11888 geo2sum2 12197 ege2le3 12353 cos2tsin 12433 cos12dec 12450 odd2np1 12555 oddp1even 12558 mod2eq1n2dvds 12561 oddge22np1 12563 prmdiv 12928 hoverb 15505 sin0pilem1 15638 cos2pi 15661 cosq34lt1 15707 lgslem4 15868 gausslemma2dlem1a 15923 lgseisenlem1 15935 2lgslem3c 15960 clwwlkn2 16408 clwwlkext2edg 16409 ex-fl 16485 |
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