| Mathbox for Norm Megill |
< Previous
Next >
Related theorems Unicode version |
| Description: Projective subspace sum is idempotent. Part of Lemma 16.2 of [MaedaMaeda] p. 68. |
| Ref | Expression |
|---|---|
| paddidm.s |
|
| paddidm.p |
|
| Ref | Expression |
|---|---|
| paddidm |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpl 346 |
. . . . 5
| |
| 2 | eqid 1884 |
. . . . . 6
| |
| 3 | paddidm.s |
. . . . . 6
| |
| 4 | 2, 3 | psubssat 17234 |
. . . . 5
|
| 5 | eqid 1884 |
. . . . . 6
| |
| 6 | eqid 1884 |
. . . . . 6
| |
| 7 | paddidm.p |
. . . . . 6
| |
| 8 | 5, 6, 2, 7 | elpadd 17260 |
. . . . 5
|
| 9 | 1, 4, 4, 8 | syl111anc 1100 |
. . . 4
|
| 10 | pm1.2 265 |
. . . . . 6
| |
| 11 | 10 | a1i 8 |
. . . . 5
|
| 12 | 5, 6, 2, 3 | psubspi 17228 |
. . . . . . 7
|
| 13 | 12 | 3exp1 1084 |
. . . . . 6
|
| 14 | 13 | imp4b 392 |
. . . . 5
|
| 15 | 11, 14 | jaod 469 |
. . . 4
|
| 16 | 9, 15 | sylbid 220 |
. . 3
|
| 17 | 16 | ssrdv 2622 |
. 2
|
| 18 | 2, 7 | sspadd1 17276 |
. . 3
|
| 19 | 1, 4, 4, 18 | syl111anc 1100 |
. 2
|
| 20 | 17, 19 | eqssd 2633 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: paddcl 17303 paddss 17306 pmodi 17309 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-rep 3428 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-3an 860 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-ral 2109 df-rex 2110 df-rab 2112 df-v 2294 df-sbc 2454 df-csb 2541 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-br 3339 df-opab 3396 df-id 3586 df-xp 4000 df-rel 4001 df-cnv 4002 df-co 4003 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-fun 4008 df-fn 4009 df-fv 4014 df-opr 4886 df-oprab 4887 df-mpt 5006 df-mpt2 5007 df-psubsp 17217 df-padd 17257 |