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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 9452 | . 2 ⊢ ;10 = (((9 + 1) · 1) + 0) | |
2 | 9nn 9153 | . . . . . 6 ⊢ 9 ∈ ℕ | |
3 | 1nn 8995 | . . . . . 6 ⊢ 1 ∈ ℕ | |
4 | nnaddcl 9004 | . . . . . 6 ⊢ ((9 ∈ ℕ ∧ 1 ∈ ℕ) → (9 + 1) ∈ ℕ) | |
5 | 2, 3, 4 | mp2an 426 | . . . . 5 ⊢ (9 + 1) ∈ ℕ |
6 | 5 | nncni 8994 | . . . 4 ⊢ (9 + 1) ∈ ℂ |
7 | 6 | mulid1i 8023 | . . 3 ⊢ ((9 + 1) · 1) = (9 + 1) |
8 | 7 | oveq1i 5929 | . 2 ⊢ (((9 + 1) · 1) + 0) = ((9 + 1) + 0) |
9 | 6 | addid1i 8163 | . 2 ⊢ ((9 + 1) + 0) = (9 + 1) |
10 | 1, 8, 9 | 3eqtrri 2219 | 1 ⊢ (9 + 1) = ;10 |
Colors of variables: wff set class |
Syntax hints: = wceq 1364 ∈ wcel 2164 (class class class)co 5919 0cc0 7874 1c1 7875 + caddc 7877 · cmul 7879 ℕcn 8984 9c9 9042 ;cdc 9451 |
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-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2175 ax-sep 4148 ax-cnex 7965 ax-resscn 7966 ax-1cn 7967 ax-1re 7968 ax-icn 7969 ax-addcl 7970 ax-addrcl 7971 ax-mulcl 7972 ax-mulcom 7975 ax-addass 7976 ax-mulass 7977 ax-distr 7978 ax-1rid 7981 ax-0id 7982 ax-cnre 7985 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 df-rex 2478 df-rab 2481 df-v 2762 df-un 3158 df-in 3160 df-ss 3167 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-int 3872 df-br 4031 df-iota 5216 df-fv 5263 df-ov 5922 df-inn 8985 df-2 9043 df-3 9044 df-4 9045 df-5 9046 df-6 9047 df-7 9048 df-8 9049 df-9 9050 df-dec 9452 |
This theorem is referenced by: dfdec10 9454 10nn 9466 le9lt10 9477 decsucc 9491 5p5e10 9521 6p4e10 9522 7p3e10 9525 8p2e10 9530 9p2e11 9537 10m1e9 9546 9lt10 9581 sq10e99m1 10787 3dvdsdec 12009 3dvds2dec 12010 |
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