| Step | Hyp | Ref
| Expression |
|---|
| 1 | | eqid 2725 |
. . . 4
β’
(LSubSpβπ) =
(LSubSpβπ) |
| 2 | | mapdindp1.n |
. . . 4
β’ π = (LSpanβπ) |
| 3 | | mapdindp1.w |
. . . . 5
β’ (π β π β LVec) |
| 4 | | lveclmod 20995 |
. . . . 5
β’ (π β LVec β π β LMod) |
| 5 | 3, 4 | syl 17 |
. . . 4
β’ (π β π β LMod) |
| 6 | | mapdindp1.y |
. . . . . . 7
β’ (π β π β (π β { 0 })) |
| 7 | 6 | eldifad 3951 |
. . . . . 6
β’ (π β π β π) |
| 8 | | mapdindp1.v |
. . . . . . 7
β’ π = (Baseβπ) |
| 9 | 8, 1, 2 | lspsncl 20865 |
. . . . . 6
β’ ((π β LMod β§ π β π) β (πβ{π}) β (LSubSpβπ)) |
| 10 | 5, 7, 9 | syl2anc 582 |
. . . . 5
β’ (π β (πβ{π}) β (LSubSpβπ)) |
| 11 | | mapdindp1.e |
. . . . . 6
β’ (π β (πβ{π}) = (πβ{π})) |
| 12 | 11, 10 | eqeltrrd 2826 |
. . . . 5
β’ (π β (πβ{π}) β (LSubSpβπ)) |
| 13 | | eqid 2725 |
. . . . . 6
β’
(LSSumβπ) =
(LSSumβπ) |
| 14 | 1, 13 | lsmcl 20972 |
. . . . 5
β’ ((π β LMod β§ (πβ{π}) β (LSubSpβπ) β§ (πβ{π}) β (LSubSpβπ)) β ((πβ{π})(LSSumβπ)(πβ{π})) β (LSubSpβπ)) |
| 15 | 5, 10, 12, 14 | syl3anc 1368 |
. . . 4
β’ (π β ((πβ{π})(LSSumβπ)(πβ{π})) β (LSubSpβπ)) |
| 16 | 1 | lsssssubg 20846 |
. . . . . . 7
β’ (π β LMod β
(LSubSpβπ) β
(SubGrpβπ)) |
| 17 | 5, 16 | syl 17 |
. . . . . 6
β’ (π β (LSubSpβπ) β (SubGrpβπ)) |
| 18 | 17, 10 | sseldd 3973 |
. . . . 5
β’ (π β (πβ{π}) β (SubGrpβπ)) |
| 19 | 11, 18 | eqeltrrd 2826 |
. . . . 5
β’ (π β (πβ{π}) β (SubGrpβπ)) |
| 20 | 8, 2 | lspsnid 20881 |
. . . . . 6
β’ ((π β LMod β§ π β π) β π β (πβ{π})) |
| 21 | 5, 7, 20 | syl2anc 582 |
. . . . 5
β’ (π β π β (πβ{π})) |
| 22 | | mapdindp1.z |
. . . . . . 7
β’ (π β π β (π β { 0 })) |
| 23 | 22 | eldifad 3951 |
. . . . . 6
β’ (π β π β π) |
| 24 | 8, 2 | lspsnid 20881 |
. . . . . 6
β’ ((π β LMod β§ π β π) β π β (πβ{π})) |
| 25 | 5, 23, 24 | syl2anc 582 |
. . . . 5
β’ (π β π β (πβ{π})) |
| 26 | | mapdindp1.p |
. . . . . 6
β’ + =
(+gβπ) |
| 27 | 26, 13 | lsmelvali 19609 |
. . . . 5
β’ ((((πβ{π}) β (SubGrpβπ) β§ (πβ{π}) β (SubGrpβπ)) β§ (π β (πβ{π}) β§ π β (πβ{π}))) β (π + π) β ((πβ{π})(LSSumβπ)(πβ{π}))) |
| 28 | 18, 19, 21, 25, 27 | syl22anc 837 |
. . . 4
β’ (π β (π + π) β ((πβ{π})(LSSumβπ)(πβ{π}))) |
| 29 | 1, 2, 5, 15, 28 | lspsnel5a 20884 |
. . 3
β’ (π β (πβ{(π + π)}) β ((πβ{π})(LSSumβπ)(πβ{π}))) |
| 30 | 11 | oveq2d 7432 |
. . . 4
β’ (π β ((πβ{π})(LSSumβπ)(πβ{π})) = ((πβ{π})(LSSumβπ)(πβ{π}))) |
| 31 | 13 | lsmidm 19622 |
. . . . 5
β’ ((πβ{π}) β (SubGrpβπ) β ((πβ{π})(LSSumβπ)(πβ{π})) = (πβ{π})) |
| 32 | 18, 31 | syl 17 |
. . . 4
β’ (π β ((πβ{π})(LSSumβπ)(πβ{π})) = (πβ{π})) |
| 33 | 30, 32 | eqtr3d 2767 |
. . 3
β’ (π β ((πβ{π})(LSSumβπ)(πβ{π})) = (πβ{π})) |
| 34 | 29, 33 | sseqtrd 4013 |
. 2
β’ (π β (πβ{(π + π)}) β (πβ{π})) |
| 35 | | mapdindp1.o |
. . 3
β’ 0 =
(0gβπ) |
| 36 | 8, 26 | lmodvacl 20762 |
. . . . 5
β’ ((π β LMod β§ π β π β§ π β π) β (π + π) β π) |
| 37 | 5, 7, 23, 36 | syl3anc 1368 |
. . . 4
β’ (π β (π + π) β π) |
| 38 | | mapdindp1.yz |
. . . 4
β’ (π β (π + π) β 0 ) |
| 39 | | eldifsn 4786 |
. . . 4
β’ ((π + π) β (π β { 0 }) β ((π + π) β π β§ (π + π) β 0 )) |
| 40 | 37, 38, 39 | sylanbrc 581 |
. . 3
β’ (π β (π + π) β (π β { 0 })) |
| 41 | 8, 35, 2, 3, 40, 7 | lspsncmp 21008 |
. 2
β’ (π β ((πβ{(π + π)}) β (πβ{π}) β (πβ{(π + π)}) = (πβ{π}))) |
| 42 | 34, 41 | mpbid 231 |
1
β’ (π β (πβ{(π + π)}) = (πβ{π})) |
