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Related theorems Unicode version |
| Description: Value of subspace sum of two Hilbert space subspaces. Definition of subspace sum in [Kalmbach] p. 65. |
| Ref | Expression |
|---|---|
| shsumvalt |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-hilex 8824 |
. . 3
| |
| 2 | 1 | rabex 2723 |
. 2
|
| 3 | rexeq1 1786 |
. . 3
| |
| 4 | 3 | rabbisdv 1805 |
. 2
|
| 5 | rexeq1 1786 |
. . . 4
| |
| 6 | 5 | rexbidv 1663 |
. . 3
|
| 7 | 6 | rabbisdv 1805 |
. 2
|
| 8 | df-shsum 9228 |
. 2
| |
| 9 | 2, 4, 7, 8 | oprabval2 4026 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: shselt 9233 shscl 9236 |
| 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 2701 ax-pow 2740 ax-pr 2777 ax-hilex 8824 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 777 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1586 df-rex 1649 df-rab 1651 df-v 1810 df-sbc 1940 df-csb 2000 df-dif 2047 df-un 2048 df-in 2049 df-ss 2051 df-nul 2279 df-pw 2400 df-sn 2410 df-pr 2411 df-op 2414 df-uni 2502 df-br 2618 df-opab 2665 df-id 2833 df-xp 3182 df-rel 3183 df-cnv 3184 df-co 3185 df-dm 3186 df-rn 3187 df-res 3188 df-ima 3189 df-fun 3190 df-fv 3196 df-opr 3963 df-oprab 3964 df-shsum 9228 |