Description: The gcd of 60 and 6 is 6. (Contributed by metakunt, 25-Apr-2024)
Ref | Expression | ||
---|---|---|---|
Assertion | 60gcd6e6 | ⊢ ( ; 6 0 gcd 6 ) = 6 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 6nn | ⊢ 6 ∈ ℕ | |
2 | 1 | decnncl2 | ⊢ ; 6 0 ∈ ℕ |
3 | 1 2 | gcdcomnni | ⊢ ( 6 gcd ; 6 0 ) = ( ; 6 0 gcd 6 ) |
4 | 1 | nnnn0i | ⊢ 6 ∈ ℕ0 |
5 | 1nn0 | ⊢ 1 ∈ ℕ0 | |
6 | 0nn0 | ⊢ 0 ∈ ℕ0 | |
7 | eqid | ⊢ ; 1 0 = ; 1 0 | |
8 | 6cn | ⊢ 6 ∈ ℂ | |
9 | 8 | mulid2i | ⊢ ( 1 · 6 ) = 6 |
10 | 8 | mul02i | ⊢ ( 0 · 6 ) = 0 |
11 | 4 5 6 7 9 10 | decmul1 | ⊢ ( ; 1 0 · 6 ) = ; 6 0 |
12 | 10nn | ⊢ ; 1 0 ∈ ℕ | |
13 | 12 1 | mulcomnni | ⊢ ( ; 1 0 · 6 ) = ( 6 · ; 1 0 ) |
14 | 11 13 | eqtr3i | ⊢ ; 6 0 = ( 6 · ; 1 0 ) |
15 | 14 | oveq2i | ⊢ ( 6 gcd ; 6 0 ) = ( 6 gcd ( 6 · ; 1 0 ) ) |
16 | 1 12 | gcdmultiplei | ⊢ ( 6 gcd ( 6 · ; 1 0 ) ) = 6 |
17 | 15 16 | eqtri | ⊢ ( 6 gcd ; 6 0 ) = 6 |
18 | 3 17 | eqtr3i | ⊢ ( ; 6 0 gcd 6 ) = 6 |