This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: Commuted version of remulcan2d without ax-mulcom . (Contributed by SN, 21-Feb-2024)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | remulcand.1 | ⊢ ( 𝜑 → 𝐴 ∈ ℝ ) | |
| remulcand.2 | ⊢ ( 𝜑 → 𝐵 ∈ ℝ ) | ||
| remulcand.3 | ⊢ ( 𝜑 → 𝐶 ∈ ℝ ) | ||
| remulcand.4 | ⊢ ( 𝜑 → 𝐶 ≠ 0 ) | ||
| Assertion | remulcand | ⊢ ( 𝜑 → ( ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ↔ 𝐴 = 𝐵 ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | remulcand.1 | ⊢ ( 𝜑 → 𝐴 ∈ ℝ ) | |
| 2 | remulcand.2 | ⊢ ( 𝜑 → 𝐵 ∈ ℝ ) | |
| 3 | remulcand.3 | ⊢ ( 𝜑 → 𝐶 ∈ ℝ ) | |
| 4 | remulcand.4 | ⊢ ( 𝜑 → 𝐶 ≠ 0 ) | |
| 5 | ax-rrecex | ⊢ ( ( 𝐶 ∈ ℝ ∧ 𝐶 ≠ 0 ) → ∃ 𝑥 ∈ ℝ ( 𝐶 · 𝑥 ) = 1 ) | |
| 6 | 3 4 5 | syl2anc | ⊢ ( 𝜑 → ∃ 𝑥 ∈ ℝ ( 𝐶 · 𝑥 ) = 1 ) |
| 7 | 3 | adantr | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) → 𝐶 ∈ ℝ ) |
| 8 | 7 | adantr | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝐶 · 𝑥 ) = 1 ) → 𝐶 ∈ ℝ ) |
| 9 | simplr | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝐶 · 𝑥 ) = 1 ) → 𝑥 ∈ ℝ ) | |
| 10 | simpr | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝐶 · 𝑥 ) = 1 ) → ( 𝐶 · 𝑥 ) = 1 ) | |
| 11 | 8 9 10 | remulinvcom | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝐶 · 𝑥 ) = 1 ) → ( 𝑥 · 𝐶 ) = 1 ) |
| 12 | 11 | ex | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) → ( ( 𝐶 · 𝑥 ) = 1 → ( 𝑥 · 𝐶 ) = 1 ) ) |
| 13 | oveq2 | ⊢ ( ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) → ( 𝑥 · ( 𝐶 · 𝐴 ) ) = ( 𝑥 · ( 𝐶 · 𝐵 ) ) ) | |
| 14 | 13 | 3ad2ant3 | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( 𝑥 · ( 𝐶 · 𝐴 ) ) = ( 𝑥 · ( 𝐶 · 𝐵 ) ) ) |
| 15 | simp2 | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( 𝑥 · 𝐶 ) = 1 ) | |
| 16 | 15 | oveq1d | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( ( 𝑥 · 𝐶 ) · 𝐴 ) = ( 1 · 𝐴 ) ) |
| 17 | simp1r | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝑥 ∈ ℝ ) | |
| 18 | 17 | recnd | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝑥 ∈ ℂ ) |
| 19 | 7 | 3ad2ant1 | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝐶 ∈ ℝ ) |
| 20 | 19 | recnd | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝐶 ∈ ℂ ) |
| 21 | simp1l | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝜑 ) | |
| 22 | 21 1 | syl | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝐴 ∈ ℝ ) |
| 23 | 22 | recnd | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝐴 ∈ ℂ ) |
| 24 | 18 20 23 | mulassd | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( ( 𝑥 · 𝐶 ) · 𝐴 ) = ( 𝑥 · ( 𝐶 · 𝐴 ) ) ) |
| 25 | remullid | ⊢ ( 𝐴 ∈ ℝ → ( 1 · 𝐴 ) = 𝐴 ) | |
| 26 | 22 25 | syl | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( 1 · 𝐴 ) = 𝐴 ) |
| 27 | 16 24 26 | 3eqtr3d | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( 𝑥 · ( 𝐶 · 𝐴 ) ) = 𝐴 ) |
| 28 | 15 | oveq1d | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( ( 𝑥 · 𝐶 ) · 𝐵 ) = ( 1 · 𝐵 ) ) |
| 29 | 21 2 | syl | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝐵 ∈ ℝ ) |
| 30 | 29 | recnd | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝐵 ∈ ℂ ) |
| 31 | 18 20 30 | mulassd | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( ( 𝑥 · 𝐶 ) · 𝐵 ) = ( 𝑥 · ( 𝐶 · 𝐵 ) ) ) |
| 32 | remullid | ⊢ ( 𝐵 ∈ ℝ → ( 1 · 𝐵 ) = 𝐵 ) | |
| 33 | 29 32 | syl | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( 1 · 𝐵 ) = 𝐵 ) |
| 34 | 28 31 33 | 3eqtr3d | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → ( 𝑥 · ( 𝐶 · 𝐵 ) ) = 𝐵 ) |
| 35 | 14 27 34 | 3eqtr3d | ⊢ ( ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) ∧ ( 𝑥 · 𝐶 ) = 1 ∧ ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) → 𝐴 = 𝐵 ) |
| 36 | 35 | 3exp | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) → ( ( 𝑥 · 𝐶 ) = 1 → ( ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) → 𝐴 = 𝐵 ) ) ) |
| 37 | 12 36 | syld | ⊢ ( ( 𝜑 ∧ 𝑥 ∈ ℝ ) → ( ( 𝐶 · 𝑥 ) = 1 → ( ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) → 𝐴 = 𝐵 ) ) ) |
| 38 | 37 | impr | ⊢ ( ( 𝜑 ∧ ( 𝑥 ∈ ℝ ∧ ( 𝐶 · 𝑥 ) = 1 ) ) → ( ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) → 𝐴 = 𝐵 ) ) |
| 39 | 6 38 | rexlimddv | ⊢ ( 𝜑 → ( ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) → 𝐴 = 𝐵 ) ) |
| 40 | oveq2 | ⊢ ( 𝐴 = 𝐵 → ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ) | |
| 41 | 39 40 | impbid1 | ⊢ ( 𝜑 → ( ( 𝐶 · 𝐴 ) = ( 𝐶 · 𝐵 ) ↔ 𝐴 = 𝐵 ) ) |