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| Description: The absolute value (modulus) of a complex number. Proposition 10-3.7(a) of [Gleason] p. 133. |
| Ref | Expression |
|---|---|
| absvalt |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 59 |
. . . 4
| |
| 2 | fveq2 3724 |
. . . 4
| |
| 3 | 1, 2 | opreq12d 3978 |
. . 3
|
| 4 | 3 | fveq2d 3728 |
. 2
|
| 5 | df-abs 6754 |
. 2
| |
| 6 | fvex 3732 |
. 2
| |
| 7 | 4, 5, 6 | fvopab4 3780 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: absnegt 6832 absclt 6833 abscjt 6834 absvalsqt 6835 absge0 6840 absval2 6841 absmul 6847 absid 6861 absret 6866 absi 6878 absf 6906 siii 8513 norm-iii 9006 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-9 965 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-sep 2703 ax-pow 2742 ax-pr 2779 ax-un 2866 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-rex 1650 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-uni 2504 df-br 2620 df-opab 2667 df-id 2835 df-xp 3184 df-rel 3185 df-cnv 3186 df-co 3187 df-dm 3188 df-rn 3189 df-res 3190 df-ima 3191 df-fun 3192 df-fv 3198 df-opr 3965 df-abs 6754 |