| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > abvge0 | Structured version Visualization version GIF version | ||
| Description: The absolute value of a number is greater than or equal to zero. (Contributed by Mario Carneiro, 8-Sep-2014.) |
| Ref | Expression |
|---|---|
| abvf.a | ⊢ 𝐴 = (AbsVal‘𝑅) |
| abvf.b | ⊢ 𝐵 = (Base‘𝑅) |
| Ref | Expression |
|---|---|
| abvge0 | ⊢ ((𝐹 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵) → 0 ≤ (𝐹‘𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | abvf.a | . . . 4 ⊢ 𝐴 = (AbsVal‘𝑅) | |
| 2 | abvf.b | . . . 4 ⊢ 𝐵 = (Base‘𝑅) | |
| 3 | 1, 2 | abvfge0 20863 | . . 3 ⊢ (𝐹 ∈ 𝐴 → 𝐹:𝐵⟶(0[,)+∞)) |
| 4 | 3 | ffvelcdmda 7065 | . 2 ⊢ ((𝐹 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵) → (𝐹‘𝑋) ∈ (0[,)+∞)) |
| 5 | elrege0 13458 | . . 3 ⊢ ((𝐹‘𝑋) ∈ (0[,)+∞) ↔ ((𝐹‘𝑋) ∈ ℝ ∧ 0 ≤ (𝐹‘𝑋))) | |
| 6 | 5 | simprbi 501 | . 2 ⊢ ((𝐹‘𝑋) ∈ (0[,)+∞) → 0 ≤ (𝐹‘𝑋)) |
| 7 | 4, 6 | syl 17 | 1 ⊢ ((𝐹 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵) → 0 ≤ (𝐹‘𝑋)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 = wceq 1560 ∈ wcel 2142 class class class wbr 5100 ‘cfv 6521 (class class class)co 7396 ℝcr 11072 0cc0 11073 +∞cpnf 11213 ≤ cle 11217 [,)cico 13351 Basecbs 17245 AbsValcabv 20857 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-cnex 11129 ax-resscn 11130 ax-1cn 11131 ax-addrcl 11134 ax-rnegex 11144 ax-cnre 11146 ax-pre-lttri 11147 ax-pre-lttrn 11148 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5542 df-po 5555 df-so 5556 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-ov 7399 df-oprab 7400 df-mpo 7401 df-er 8678 df-map 8810 df-en 8928 df-dom 8929 df-sdom 8930 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-le 11222 df-ico 13355 df-abv 20858 |
| This theorem is referenced by: abvgt0 20869 abvneg 20875 abvcxp 27679 ostth2lem2 27698 fiabv 43154 |
| Copyright terms: Public domain | W3C validator |