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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 8233. (Contributed by David A. Wheeler, 4-Jan-2017.) |
Ref | Expression |
---|---|
2m1e1 | ⊢ (2 − 1) = 1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2cn 8166 | . 2 ⊢ 2 ∈ ℂ | |
2 | ax-1cn 7120 | . 2 ⊢ 1 ∈ ℂ | |
3 | 1p1e2 8211 | . 2 ⊢ (1 + 1) = 2 | |
4 | 1, 2, 2, 3 | subaddrii 7453 | 1 ⊢ (2 − 1) = 1 |
Colors of variables: wff set class |
Syntax hints: = wceq 1285 (class class class)co 5537 1c1 7033 − cmin 7335 2c2 8145 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-in1 577 ax-in2 578 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-14 1446 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-sep 3898 ax-pow 3950 ax-pr 3966 ax-setind 4282 ax-resscn 7119 ax-1cn 7120 ax-1re 7121 ax-icn 7122 ax-addcl 7123 ax-addrcl 7124 ax-mulcl 7125 ax-addcom 7127 ax-addass 7129 ax-distr 7131 ax-i2m1 7132 ax-0id 7135 ax-rnegex 7136 ax-cnre 7138 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-fal 1291 df-nf 1391 df-sb 1687 df-eu 1945 df-mo 1946 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ne 2247 df-ral 2354 df-rex 2355 df-reu 2356 df-rab 2358 df-v 2604 df-sbc 2817 df-dif 2976 df-un 2978 df-in 2980 df-ss 2987 df-pw 3386 df-sn 3406 df-pr 3407 df-op 3409 df-uni 3604 df-br 3788 df-opab 3842 df-id 4050 df-xp 4371 df-rel 4372 df-cnv 4373 df-co 4374 df-dm 4375 df-iota 4891 df-fun 4928 df-fv 4934 df-riota 5493 df-ov 5540 df-oprab 5541 df-mpt2 5542 df-sub 7337 df-2 8154 |
This theorem is referenced by: 1e2m1 8213 1mhlfehlf 8305 addltmul 8323 xp1d2m1eqxm1d2 8339 nn0lt2 8499 zeo 8522 fzo0to2pr 9293 bcn2 9777 maxabslemlub 10220 odd2np1 10406 oddp1even 10409 mod2eq1n2dvds 10412 oddge22np1 10414 ex-fl 10699 |
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