Metamath Proof Explorer


Theorem 00id

Description: 0 is its own additive identity. (Contributed by Scott Fenton, 3-Jan-2013)

Ref Expression
Assertion 00id ⊢ 0 + 0 = 0

Proof

Step Hyp Ref Expression
1 0re ⊢ 0 ∈ ℝ
2 ax-rnegex ⊢ 0 ∈ ℝ → ∃ c ∈ ℝ 0 + c = 0
3 oveq2 ⊢ c = 0 → 0 + c = 0 + 0
4 3 eqeq1d ⊢ c = 0 → 0 + c = 0 ↔ 0 + 0 = 0
5 4 biimpd ⊢ c = 0 → 0 + c = 0 → 0 + 0 = 0
6 5 adantld ⊢ c = 0 → c ∈ ℝ ∧ 0 + c = 0 → 0 + 0 = 0
7 ax-rrecex ⊢ c ∈ ℝ ∧ c ≠ 0 → ∃ y ∈ ℝ c ⁢ y = 1
8 7 adantlr ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 → ∃ y ∈ ℝ c ⁢ y = 1
9 simplll ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ∈ ℝ
10 9 recnd ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ∈ ℂ
11 simprl ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → y ∈ ℝ
12 11 recnd ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → y ∈ ℂ
13 0cn ⊢ 0 ∈ ℂ
14 mulass ⊢ c ∈ ℂ ∧ y ∈ ℂ ∧ 0 ∈ ℂ → c ⁢ y ⋅ 0 = c ⁢ y ⋅ 0
15 13 14 mp3an3 ⊢ c ∈ ℂ ∧ y ∈ ℂ → c ⁢ y ⋅ 0 = c ⁢ y ⋅ 0
16 10 12 15 syl2anc ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 = c ⁢ y ⋅ 0
17 oveq1 ⊢ c ⁢ y = 1 → c ⁢ y ⋅ 0 = 1 ⋅ 0
18 13 mullidi ⊢ 1 ⋅ 0 = 0
19 17 18 eqtrdi ⊢ c ⁢ y = 1 → c ⁢ y ⋅ 0 = 0
20 19 ad2antll ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 = 0
21 16 20 eqtr3d ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 = 0
22 21 oveq1d ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 + 0 = 0 + 0
23 simpllr ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 + c = 0
24 23 oveq1d ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 + c ⁢ y ⋅ 0 = 0 ⋅ y ⋅ 0
25 remulcl ⊢ y ∈ ℝ ∧ 0 ∈ ℝ → y ⋅ 0 ∈ ℝ
26 1 25 mpan2 ⊢ y ∈ ℝ → y ⋅ 0 ∈ ℝ
27 26 ad2antrl ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → y ⋅ 0 ∈ ℝ
28 27 recnd ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → y ⋅ 0 ∈ ℂ
29 adddir ⊢ 0 ∈ ℂ ∧ c ∈ ℂ ∧ y ⋅ 0 ∈ ℂ → 0 + c ⁢ y ⋅ 0 = 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0
30 13 10 28 29 mp3an2i ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 + c ⁢ y ⋅ 0 = 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0
31 24 30 eqtr3d ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 ⋅ y ⋅ 0 = 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0
32 31 oveq1d ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 ⋅ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0
33 remulcl ⊢ 0 ∈ ℝ ∧ y ⋅ 0 ∈ ℝ → 0 ⋅ y ⋅ 0 ∈ ℝ
34 1 26 33 sylancr ⊢ y ∈ ℝ → 0 ⋅ y ⋅ 0 ∈ ℝ
35 34 ad2antrl ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 ⋅ y ⋅ 0 ∈ ℝ
36 35 recnd ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 ⋅ y ⋅ 0 ∈ ℂ
37 remulcl ⊢ c ∈ ℝ ∧ y ⋅ 0 ∈ ℝ → c ⁢ y ⋅ 0 ∈ ℝ
38 9 27 37 syl2anc ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 ∈ ℝ
39 38 recnd ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 ∈ ℂ
40 addass ⊢ 0 ⋅ y ⋅ 0 ∈ ℂ ∧ c ⁢ y ⋅ 0 ∈ ℂ ∧ 0 ∈ ℂ → 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0
41 13 40 mp3an3 ⊢ 0 ⋅ y ⋅ 0 ∈ ℂ ∧ c ⁢ y ⋅ 0 ∈ ℂ → 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0
42 36 39 41 syl2anc ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0
43 32 42 eqtr2d ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + 0
44 26 37 sylan2 ⊢ c ∈ ℝ ∧ y ∈ ℝ → c ⁢ y ⋅ 0 ∈ ℝ
45 readdcl ⊢ c ⁢ y ⋅ 0 ∈ ℝ ∧ 0 ∈ ℝ → c ⁢ y ⋅ 0 + 0 ∈ ℝ
46 44 1 45 sylancl ⊢ c ∈ ℝ ∧ y ∈ ℝ → c ⁢ y ⋅ 0 + 0 ∈ ℝ
47 9 11 46 syl2anc ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 + 0 ∈ ℝ
48 readdcan ⊢ c ⁢ y ⋅ 0 + 0 ∈ ℝ ∧ 0 ∈ ℝ ∧ 0 ⋅ y ⋅ 0 ∈ ℝ → 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + 0 ↔ c ⁢ y ⋅ 0 + 0 = 0
49 1 48 mp3an2 ⊢ c ⁢ y ⋅ 0 + 0 ∈ ℝ ∧ 0 ⋅ y ⋅ 0 ∈ ℝ → 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + 0 ↔ c ⁢ y ⋅ 0 + 0 = 0
50 47 35 49 syl2anc ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 ⋅ y ⋅ 0 + c ⁢ y ⋅ 0 + 0 = 0 ⋅ y ⋅ 0 + 0 ↔ c ⁢ y ⋅ 0 + 0 = 0
51 43 50 mpbid ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → c ⁢ y ⋅ 0 + 0 = 0
52 22 51 eqtr3d ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 ∧ y ∈ ℝ ∧ c ⁢ y = 1 → 0 + 0 = 0
53 8 52 rexlimddv ⊢ c ∈ ℝ ∧ 0 + c = 0 ∧ c ≠ 0 → 0 + 0 = 0
54 53 expcom ⊢ c ≠ 0 → c ∈ ℝ ∧ 0 + c = 0 → 0 + 0 = 0
55 6 54 pm2.61ine ⊢ c ∈ ℝ ∧ 0 + c = 0 → 0 + 0 = 0
56 55 rexlimiva ⊢ ∃ c ∈ ℝ 0 + c = 0 → 0 + 0 = 0
57 1 2 56 mp2b ⊢ 0 + 0 = 0