Theorem submat1n 29871

Description: One case where the submatrix with integer indices, subMat1, and the general submatrix subMat, agree. (Contributed by Thierry Arnoux, 22-Aug-2020.)

Hypotheses

Ref	Expression
submat1n.a	⊢ 𝐴 = ((1...𝑁) Mat 𝑅)
submat1n.b	⊢ 𝐵 = (Base‘𝐴)

Assertion

Ref	Expression
submat1n	⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → (𝑁(subMat1‘𝑀)𝑁) = (𝑁(((1...𝑁) subMat 𝑅)‘𝑀)𝑁))

Proof of Theorem submat1n

Dummy variables 𝑖 𝑗 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fzdif2 29551	. . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘1) → ((1...𝑁) ∖ {𝑁}) = (1...(𝑁 − 1)))
2		nnuz 11723	. . . . 5 ⊢ ℕ = (ℤ≥‘1)
3	1, 2	eleq2s 2719	. . . 4 ⊢ (𝑁 ∈ ℕ → ((1...𝑁) ∖ {𝑁}) = (1...(𝑁 − 1)))
4	3	adantr 481	. . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → ((1...𝑁) ∖ {𝑁}) = (1...(𝑁 − 1)))
5	4	adantr 481	. . 3 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ 𝑖 ∈ ((1...𝑁) ∖ {𝑁})) → ((1...𝑁) ∖ {𝑁}) = (1...(𝑁 − 1)))
6		eqid 2622	. . . . 5 ⊢ (𝑁(subMat1‘𝑀)𝑁) = (𝑁(subMat1‘𝑀)𝑁)
7		elfz1end 12371	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ ↔ 𝑁 ∈ (1...𝑁))
8	7	biimpi 206	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ (1...𝑁))
9	8	adantr 481	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → 𝑁 ∈ (1...𝑁))
10	9, 7	sylibr 224	. . . . . 6 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → 𝑁 ∈ ℕ)
11	10	adantr 481	. . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → 𝑁 ∈ ℕ)
12	11, 8	syl 17	. . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → 𝑁 ∈ (1...𝑁))
13		submat1n.a	. . . . . . 7 ⊢ 𝐴 = ((1...𝑁) Mat 𝑅)
14		eqid 2622	. . . . . . 7 ⊢ (Base‘𝑅) = (Base‘𝑅)
15		submat1n.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝐴)
16	13, 14, 15	matbas2i 20228	. . . . . 6 ⊢ (𝑀 ∈ 𝐵 → 𝑀 ∈ ((Base‘𝑅) ↑𝑚 ((1...𝑁) × (1...𝑁))))
17	16	ad2antlr 763	. . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → 𝑀 ∈ ((Base‘𝑅) ↑𝑚 ((1...𝑁) × (1...𝑁))))
18		simprl 794	. . . . . 6 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → 𝑖 ∈ ((1...𝑁) ∖ {𝑁}))
19		nnz 11399	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ)
20		fzoval 12471	. . . . . . . . 9 ⊢ (𝑁 ∈ ℤ → (1..^𝑁) = (1...(𝑁 − 1)))
21	19, 20	syl 17	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → (1..^𝑁) = (1...(𝑁 − 1)))
22	21, 3	eqtr4d 2659	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → (1..^𝑁) = ((1...𝑁) ∖ {𝑁}))
23	11, 22	syl 17	. . . . . 6 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → (1..^𝑁) = ((1...𝑁) ∖ {𝑁}))
24	18, 23	eleqtrrd 2704	. . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → 𝑖 ∈ (1..^𝑁))
25		simprr 796	. . . . . 6 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))
26	25, 23	eleqtrrd 2704	. . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → 𝑗 ∈ (1..^𝑁))
27	6, 11, 11, 12, 12, 17, 24, 26	smattl 29864	. . . 4 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → (𝑖(𝑁(subMat1‘𝑀)𝑁)𝑗) = (𝑖𝑀𝑗))
28	27	eqcomd 2628	. . 3 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) ∧ (𝑖 ∈ ((1...𝑁) ∖ {𝑁}) ∧ 𝑗 ∈ ((1...𝑁) ∖ {𝑁}))) → (𝑖𝑀𝑗) = (𝑖(𝑁(subMat1‘𝑀)𝑁)𝑗))
29	4, 5, 28	mpt2eq123dva 6716	. 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → (𝑖 ∈ ((1...𝑁) ∖ {𝑁}), 𝑗 ∈ ((1...𝑁) ∖ {𝑁}) ↦ (𝑖𝑀𝑗)) = (𝑖 ∈ (1...(𝑁 − 1)), 𝑗 ∈ (1...(𝑁 − 1)) ↦ (𝑖(𝑁(subMat1‘𝑀)𝑁)𝑗)))
30		simpr 477	. . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → 𝑀 ∈ 𝐵)
31		eqid 2622	. . . 4 ⊢ ((1...𝑁) subMat 𝑅) = ((1...𝑁) subMat 𝑅)
32	13, 31, 15	submaval 20387	. . 3 ⊢ ((𝑀 ∈ 𝐵 ∧ 𝑁 ∈ (1...𝑁) ∧ 𝑁 ∈ (1...𝑁)) → (𝑁(((1...𝑁) subMat 𝑅)‘𝑀)𝑁) = (𝑖 ∈ ((1...𝑁) ∖ {𝑁}), 𝑗 ∈ ((1...𝑁) ∖ {𝑁}) ↦ (𝑖𝑀𝑗)))
33	30, 9, 9, 32	syl3anc 1326	. 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → (𝑁(((1...𝑁) subMat 𝑅)‘𝑀)𝑁) = (𝑖 ∈ ((1...𝑁) ∖ {𝑁}), 𝑗 ∈ ((1...𝑁) ∖ {𝑁}) ↦ (𝑖𝑀𝑗)))
34		eqid 2622	. . . 4 ⊢ (Base‘((1...(𝑁 − 1)) Mat 𝑅)) = (Base‘((1...(𝑁 − 1)) Mat 𝑅))
35	13, 15, 34, 6, 10, 9, 9, 30	smatcl 29868	. . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → (𝑁(subMat1‘𝑀)𝑁) ∈ (Base‘((1...(𝑁 − 1)) Mat 𝑅)))
36		eqid 2622	. . . 4 ⊢ ((1...(𝑁 − 1)) Mat 𝑅) = ((1...(𝑁 − 1)) Mat 𝑅)
37	36, 34	matmpt2 29869	. . 3 ⊢ ((𝑁(subMat1‘𝑀)𝑁) ∈ (Base‘((1...(𝑁 − 1)) Mat 𝑅)) → (𝑁(subMat1‘𝑀)𝑁) = (𝑖 ∈ (1...(𝑁 − 1)), 𝑗 ∈ (1...(𝑁 − 1)) ↦ (𝑖(𝑁(subMat1‘𝑀)𝑁)𝑗)))
38	35, 37	syl 17	. 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → (𝑁(subMat1‘𝑀)𝑁) = (𝑖 ∈ (1...(𝑁 − 1)), 𝑗 ∈ (1...(𝑁 − 1)) ↦ (𝑖(𝑁(subMat1‘𝑀)𝑁)𝑗)))
39	29, 33, 38	3eqtr4rd 2667	1 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ 𝐵) → (𝑁(subMat1‘𝑀)𝑁) = (𝑁(((1...𝑁) subMat 𝑅)‘𝑀)𝑁))

Syntax hints:   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990   ∖ cdif 3571  {csn 4177   × cxp 5112  ‘cfv 5888  (class class class)co 6650   ↦ cmpt2 6652   ↑_𝑚 cmap 7857  1c1 9937   − cmin 10266  ℕcn 11020  ℤcz 11377  ℤ_≥cuz 11687  ...cfz 12326  ..^cfzo 12465  Basecbs 15857   Mat cmat 20213   subMat csubma 20382  subMat1csmat 29859

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-ot 4186  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-supp 7296  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-map 7859  df-ixp 7909  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-fsupp 8276  df-sup 8348  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-3 11080  df-4 11081  df-5 11082  df-6 11083  df-7 11084  df-8 11085  df-9 11086  df-n0 11293  df-z 11378  df-dec 11494  df-uz 11688  df-fz 12327  df-fzo 12466  df-struct 15859  df-ndx 15860  df-slot 15861  df-base 15863  df-sets 15864  df-ress 15865  df-plusg 15954  df-mulr 15955  df-sca 15957  df-vsca 15958  df-ip 15959  df-tset 15960  df-ple 15961  df-ds 15964  df-hom 15966  df-cco 15967  df-0g 16102  df-prds 16108  df-pws 16110  df-sra 19172  df-rgmod 19173  df-dsmm 20076  df-frlm 20091  df-mat 20214  df-subma 20383  df-smat 29860

This theorem is referenced by:  submatres  29872  madjusmdetlem1  29893