Theorem strext 13439

Description: Extending the upper range of a structure. This works because when we say that a structure has components in 𝐴...𝐶 we are not saying that every slot in that range is present, just that all the slots that are present are within that range. (Contributed by Jim Kingdon, 26-Feb-2025.)

Hypotheses

Ref	Expression
strext.f	⊢ (𝜑 → 𝐹 Struct ⟨𝐴, 𝐵⟩)
strext.c	⊢ (𝜑 → 𝐶 ∈ (ℤ≥‘𝐵))

Assertion

Ref	Expression
strext	⊢ (𝜑 → 𝐹 Struct ⟨𝐴, 𝐶⟩)

Proof of Theorem strext

Step	Hyp	Ref	Expression
1		strext.f	. . . . 5 ⊢ (𝜑 → 𝐹 Struct ⟨𝐴, 𝐵⟩)
2		isstructim 13347	. . . . 5 ⊢ (𝐹 Struct ⟨𝐴, 𝐵⟩ → ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ 𝐴 ≤ 𝐵) ∧ Fun (𝐹 ∖ {∅}) ∧ dom 𝐹 ⊆ (𝐴...𝐵)))
3	1, 2	syl 14	. . . 4 ⊢ (𝜑 → ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ 𝐴 ≤ 𝐵) ∧ Fun (𝐹 ∖ {∅}) ∧ dom 𝐹 ⊆ (𝐴...𝐵)))
4	3	simp1d 1040	. . 3 ⊢ (𝜑 → (𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ 𝐴 ≤ 𝐵))
5	4	simp1d 1040	. 2 ⊢ (𝜑 → 𝐴 ∈ ℕ)
6	4	simp2d 1041	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℕ)
7		strext.c	. . 3 ⊢ (𝜑 → 𝐶 ∈ (ℤ≥‘𝐵))
8		eluznn 9982	. . 3 ⊢ ((𝐵 ∈ ℕ ∧ 𝐶 ∈ (ℤ≥‘𝐵)) → 𝐶 ∈ ℕ)
9	6, 7, 8	syl2anc 415	. 2 ⊢ (𝜑 → 𝐶 ∈ ℕ)
10	5	nnred 9299	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ)
11	6	nnred 9299	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ)
12	9	nnred 9299	. . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ)
13	4	simp3d 1042	. . 3 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
14		eluzle 9916	. . . 4 ⊢ (𝐶 ∈ (ℤ≥‘𝐵) → 𝐵 ≤ 𝐶)
15	7, 14	syl 14	. . 3 ⊢ (𝜑 → 𝐵 ≤ 𝐶)
16	10, 11, 12, 13, 15	letrd 8443	. 2 ⊢ (𝜑 → 𝐴 ≤ 𝐶)
17	3	simp2d 1041	. 2 ⊢ (𝜑 → Fun (𝐹 ∖ {∅}))
18		structex 13345	. . 3 ⊢ (𝐹 Struct ⟨𝐴, 𝐵⟩ → 𝐹 ∈ V)
19	1, 18	syl 14	. 2 ⊢ (𝜑 → 𝐹 ∈ V)
20	3	simp3d 1042	. . 3 ⊢ (𝜑 → dom 𝐹 ⊆ (𝐴...𝐵))
21		fzss2 10451	. . . 4 ⊢ (𝐶 ∈ (ℤ≥‘𝐵) → (𝐴...𝐵) ⊆ (𝐴...𝐶))
22	7, 21	syl 14	. . 3 ⊢ (𝜑 → (𝐴...𝐵) ⊆ (𝐴...𝐶))
23	20, 22	sstrd 3258	. 2 ⊢ (𝜑 → dom 𝐹 ⊆ (𝐴...𝐶))
24		isstructr 13348	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐶 ∈ ℕ ∧ 𝐴 ≤ 𝐶) ∧ (Fun (𝐹 ∖ {∅}) ∧ 𝐹 ∈ V ∧ dom 𝐹 ⊆ (𝐴...𝐶))) → 𝐹 Struct ⟨𝐴, 𝐶⟩)
25	5, 9, 16, 17, 19, 23, 24	syl33anc 1293	1 ⊢ (𝜑 → 𝐹 Struct ⟨𝐴, 𝐶⟩)

Syntax hints:   → wi 4   ∧ w3a 1009   ∈ wcel 2209  Vcvv 2821   ∖ cdif 3217   ⊆ wss 3220  ∅c0 3520  {csn 3708  ⟨cop 3711   class class class wbr 4128  dom cdm 4772  Fun wfun 5369  ‘cfv 5375  (class class class)co 6078   ≤ cle 8354  ℕcn 9286  ℤ_≥cuz 9903  ...cfz 10393   Struct cstr 13329

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682  ax-cnex 8263  ax-resscn 8264  ax-1cn 8265  ax-1re 8266  ax-icn 8267  ax-addcl 8268  ax-addrcl 8269  ax-mulcl 8270  ax-addcom 8272  ax-addass 8274  ax-distr 8276  ax-i2m1 8277  ax-0lt1 8278  ax-0id 8280  ax-rnegex 8281  ax-cnre 8283  ax-pre-ltirr 8284  ax-pre-ltwlin 8285  ax-pre-lttrn 8286  ax-pre-ltadd 8288

This theorem depends on definitions:  df-bi 117  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-fv 5383  df-riota 6031  df-ov 6081  df-oprab 6082  df-mpo 6083  df-pnf 8355  df-mnf 8356  df-xr 8357  df-ltxr 8358  df-le 8359  df-sub 8492  df-neg 8493  df-inn 9287  df-z 9627  df-uz 9904  df-fz 10394  df-struct 13335

This theorem is referenced by: (None)