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Mirrors > Home > ILE Home > Th. List > 9p1e10 | GIF version |
Description: 9 + 1 = 10. (Contributed by Mario Carneiro, 18-Apr-2015.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 1-Aug-2021.) |
Ref | Expression |
---|---|
9p1e10 | ⊢ (9 + 1) = ;10 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-dec 9084 | . 2 ⊢ ;10 = (((9 + 1) · 1) + 0) | |
2 | 9nn 8789 | . . . . . 6 ⊢ 9 ∈ ℕ | |
3 | 1nn 8638 | . . . . . 6 ⊢ 1 ∈ ℕ | |
4 | nnaddcl 8647 | . . . . . 6 ⊢ ((9 ∈ ℕ ∧ 1 ∈ ℕ) → (9 + 1) ∈ ℕ) | |
5 | 2, 3, 4 | mp2an 420 | . . . . 5 ⊢ (9 + 1) ∈ ℕ |
6 | 5 | nncni 8637 | . . . 4 ⊢ (9 + 1) ∈ ℂ |
7 | 6 | mulid1i 7689 | . . 3 ⊢ ((9 + 1) · 1) = (9 + 1) |
8 | 7 | oveq1i 5738 | . 2 ⊢ (((9 + 1) · 1) + 0) = ((9 + 1) + 0) |
9 | 6 | addid1i 7824 | . 2 ⊢ ((9 + 1) + 0) = (9 + 1) |
10 | 1, 8, 9 | 3eqtrri 2140 | 1 ⊢ (9 + 1) = ;10 |
Colors of variables: wff set class |
Syntax hints: = wceq 1314 ∈ wcel 1463 (class class class)co 5728 0cc0 7544 1c1 7545 + caddc 7547 · cmul 7549 ℕcn 8627 9c9 8685 ;cdc 9083 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 681 ax-5 1406 ax-7 1407 ax-gen 1408 ax-ie1 1452 ax-ie2 1453 ax-8 1465 ax-10 1466 ax-11 1467 ax-i12 1468 ax-bndl 1469 ax-4 1470 ax-17 1489 ax-i9 1493 ax-ial 1497 ax-i5r 1498 ax-ext 2097 ax-sep 4006 ax-cnex 7633 ax-resscn 7634 ax-1cn 7635 ax-1re 7636 ax-icn 7637 ax-addcl 7638 ax-addrcl 7639 ax-mulcl 7640 ax-mulcom 7643 ax-addass 7644 ax-mulass 7645 ax-distr 7646 ax-1rid 7649 ax-0id 7650 ax-cnre 7653 |
This theorem depends on definitions: df-bi 116 df-3an 947 df-tru 1317 df-nf 1420 df-sb 1719 df-clab 2102 df-cleq 2108 df-clel 2111 df-nfc 2244 df-ral 2395 df-rex 2396 df-rab 2399 df-v 2659 df-un 3041 df-in 3043 df-ss 3050 df-sn 3499 df-pr 3500 df-op 3502 df-uni 3703 df-int 3738 df-br 3896 df-iota 5046 df-fv 5089 df-ov 5731 df-inn 8628 df-2 8686 df-3 8687 df-4 8688 df-5 8689 df-6 8690 df-7 8691 df-8 8692 df-9 8693 df-dec 9084 |
This theorem is referenced by: dfdec10 9086 10nn 9098 le9lt10 9109 decsucc 9123 5p5e10 9153 6p4e10 9154 7p3e10 9157 8p2e10 9162 9p2e11 9169 10m1e9 9178 9lt10 9213 sq10e99m1 10350 3dvdsdec 11407 3dvds2dec 11408 |
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