sticksstones9 - Mathbox for metakunt

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Theorem sticksstones9 41558

Description: Establish mapping between strictly monotone functions and functions that sum to a fixed non-negative integer. (Contributed by metakunt, 6-Oct-2024.)

**Hypotheses**
Ref	Expression
sticksstones9.1	⊢ (𝜑 → 𝑁 ∈ ℕ₀)
sticksstones9.2	⊢ (𝜑 → 𝐾 = 0)
sticksstones9.3	⊢ 𝐺 = (𝑏 ∈ 𝐵 ↦ if(𝐾 = 0, {⟨1, 𝑁⟩}, (𝑘 ∈ (1...(𝐾 + 1)) ↦ if(𝑘 = (𝐾 + 1), ((𝑁 + 𝐾) − (𝑏‘𝐾)), if(𝑘 = 1, ((𝑏‘1) − 1), (((𝑏‘𝑘) − (𝑏‘(𝑘 − 1))) − 1))))))
sticksstones9.4	⊢ 𝐴 = {𝑔 ∣ (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁)}
sticksstones9.5	⊢ 𝐵 = {𝑓 ∣ (𝑓:(1...𝐾)⟶(1...(𝑁 + 𝐾)) ∧ ∀𝑥 ∈ (1...𝐾)∀𝑦 ∈ (1...𝐾)(𝑥 < 𝑦 → (𝑓‘𝑥) < (𝑓‘𝑦)))}

**Assertion**
Ref	Expression
sticksstones9	⊢ (𝜑 → 𝐺:𝐵⟶𝐴)

Distinct variable groups: 𝐴,𝑏 𝐵,𝑏 𝑔,𝐾,𝑖 𝑔,𝑁,𝑖 𝜑,𝑏 Allowed substitution hints: 𝜑(𝑥,𝑦,𝑓,𝑔,𝑖,𝑘) 𝐴(𝑥,𝑦,𝑓,𝑔,𝑖,𝑘) 𝐵(𝑥,𝑦,𝑓,𝑔,𝑖,𝑘) 𝐺(𝑥,𝑦,𝑓,𝑔,𝑖,𝑘,𝑏) 𝐾(𝑥,𝑦,𝑓,𝑘,𝑏) 𝑁(𝑥,𝑦,𝑓,𝑘,𝑏)

**Proof of Theorem sticksstones9**
Step	Hyp	Ref	Expression
1		sticksstones9.2	. . . . 5 ⊢ (𝜑 → 𝐾 = 0)
2	1	iftrued 4532	. . . 4 ⊢ (𝜑 → if(𝐾 = 0, {⟨1, 𝑁⟩}, (𝑘 ∈ (1...(𝐾 + 1)) ↦ if(𝑘 = (𝐾 + 1), ((𝑁 + 𝐾) − (𝑏‘𝐾)), if(𝑘 = 1, ((𝑏‘1) − 1), (((𝑏‘𝑘) − (𝑏‘(𝑘 − 1))) − 1))))) = {⟨1, 𝑁⟩})
3	2	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → if(𝐾 = 0, {⟨1, 𝑁⟩}, (𝑘 ∈ (1...(𝐾 + 1)) ↦ if(𝑘 = (𝐾 + 1), ((𝑁 + 𝐾) − (𝑏‘𝐾)), if(𝑘 = 1, ((𝑏‘1) − 1), (((𝑏‘𝑘) − (𝑏‘(𝑘 − 1))) − 1))))) = {⟨1, 𝑁⟩})
4		eqid 2727	. . . . . . . . . . 11 ⊢ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}
5		1nn 12245	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℕ
6	5	a1i 11	. . . . . . . . . . . 12 ⊢ (𝜑 → 1 ∈ ℕ)
7		sticksstones9.1	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
8		fsng 7140	. . . . . . . . . . . 12 ⊢ ((1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀) → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ↔ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}))
9	6, 7, 8	syl2anc 583	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ↔ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}))
10	4, 9	mpbiri 258	. . . . . . . . . 10 ⊢ (𝜑 → {⟨1, 𝑁⟩}:{1}⟶{𝑁})
11	7	snssd 4808	. . . . . . . . . 10 ⊢ (𝜑 → {𝑁} ⊆ ℕ₀)
12	10, 11	jca 511	. . . . . . . . 9 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ∧ {𝑁} ⊆ ℕ₀))
13		fss 6733	. . . . . . . . 9 ⊢ (({⟨1, 𝑁⟩}:{1}⟶{𝑁} ∧ {𝑁} ⊆ ℕ₀) → {⟨1, 𝑁⟩}:{1}⟶ℕ₀)
14	12, 13	syl 17	. . . . . . . 8 ⊢ (𝜑 → {⟨1, 𝑁⟩}:{1}⟶ℕ₀)
15	1	oveq1d 7429	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐾 + 1) = (0 + 1))
16		0p1e1 12356	. . . . . . . . . . . . 13 ⊢ (0 + 1) = 1
17	15, 16	eqtrdi 2783	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐾 + 1) = 1)
18	17	oveq2d 7430	. . . . . . . . . . 11 ⊢ (𝜑 → (1...(𝐾 + 1)) = (1...1))
19		1zzd 12615	. . . . . . . . . . . 12 ⊢ (𝜑 → 1 ∈ ℤ)
20		fzsn 13567	. . . . . . . . . . . 12 ⊢ (1 ∈ ℤ → (1...1) = {1})
21	19, 20	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → (1...1) = {1})
22	18, 21	eqtrd 2767	. . . . . . . . . 10 ⊢ (𝜑 → (1...(𝐾 + 1)) = {1})
23	22	eqcomd 2733	. . . . . . . . 9 ⊢ (𝜑 → {1} = (1...(𝐾 + 1)))
24	23	feq2d 6702	. . . . . . . 8 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶ℕ₀ ↔ {⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀))
25	14, 24	mpbid 231	. . . . . . 7 ⊢ (𝜑 → {⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀)
26	22	sumeq1d 15671	. . . . . . . 8 ⊢ (𝜑 → Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖))
27		fvsng 7183	. . . . . . . . . . . . 13 ⊢ ((1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀) → ({⟨1, 𝑁⟩}‘1) = 𝑁)
28	6, 7, 27	syl2anc 583	. . . . . . . . . . . 12 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
29	7	nn0cnd 12556	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℂ)
30	28, 29	eqeltrd 2828	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) ∈ ℂ)
31	6, 30	jca 511	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ ({⟨1, 𝑁⟩}‘1) ∈ ℂ))
32		fveq2 6891	. . . . . . . . . . 11 ⊢ (𝑖 = 1 → ({⟨1, 𝑁⟩}‘𝑖) = ({⟨1, 𝑁⟩}‘1))
33	32	sumsn 15716	. . . . . . . . . 10 ⊢ ((1 ∈ ℕ ∧ ({⟨1, 𝑁⟩}‘1) ∈ ℂ) → Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖) = ({⟨1, 𝑁⟩}‘1))
34	31, 33	syl 17	. . . . . . . . 9 ⊢ (𝜑 → Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖) = ({⟨1, 𝑁⟩}‘1))
35	6, 7	jca 511	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀))
36	35, 27	syl 17	. . . . . . . . 9 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
37	34, 36	eqtrd 2767	. . . . . . . 8 ⊢ (𝜑 → Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
38	26, 37	eqtrd 2767	. . . . . . 7 ⊢ (𝜑 → Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
39	25, 38	jca 511	. . . . . 6 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
40	39	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
41		snex 5427	. . . . . 6 ⊢ {⟨1, 𝑁⟩} ∈ V
42		feq1 6697	. . . . . . . 8 ⊢ (𝑔 = {⟨1, 𝑁⟩} → (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ↔ {⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀))
43		simpl 482	. . . . . . . . . . 11 ⊢ ((𝑔 = {⟨1, 𝑁⟩} ∧ 𝑖 ∈ (1...(𝐾 + 1))) → 𝑔 = {⟨1, 𝑁⟩})
44	43	fveq1d 6893	. . . . . . . . . 10 ⊢ ((𝑔 = {⟨1, 𝑁⟩} ∧ 𝑖 ∈ (1...(𝐾 + 1))) → (𝑔‘𝑖) = ({⟨1, 𝑁⟩}‘𝑖))
45	44	sumeq2dv 15673	. . . . . . . . 9 ⊢ (𝑔 = {⟨1, 𝑁⟩} → Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖))
46	45	eqeq1d 2729	. . . . . . . 8 ⊢ (𝑔 = {⟨1, 𝑁⟩} → (Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁 ↔ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
47	42, 46	anbi12d 630	. . . . . . 7 ⊢ (𝑔 = {⟨1, 𝑁⟩} → ((𝑔:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁) ↔ ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁)))
48	47	elabg 3663	. . . . . 6 ⊢ ({⟨1, 𝑁⟩} ∈ V → ({⟨1, 𝑁⟩} ∈ {𝑔 ∣ (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁)} ↔ ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁)))
49	41, 48	ax-mp 5	. . . . 5 ⊢ ({⟨1, 𝑁⟩} ∈ {𝑔 ∣ (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁)} ↔ ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
50	40, 49	sylibr 233	. . . 4 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → {⟨1, 𝑁⟩} ∈ {𝑔 ∣ (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁)})
51		sticksstones9.4	. . . . 5 ⊢ 𝐴 = {𝑔 ∣ (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁)}
52	51	a1i 11	. . . 4 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → 𝐴 = {𝑔 ∣ (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁)})
53	50, 52	eleqtrrd 2831	. . 3 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → {⟨1, 𝑁⟩} ∈ 𝐴)
54	3, 53	eqeltrd 2828	. 2 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → if(𝐾 = 0, {⟨1, 𝑁⟩}, (𝑘 ∈ (1...(𝐾 + 1)) ↦ if(𝑘 = (𝐾 + 1), ((𝑁 + 𝐾) − (𝑏‘𝐾)), if(𝑘 = 1, ((𝑏‘1) − 1), (((𝑏‘𝑘) − (𝑏‘(𝑘 − 1))) − 1))))) ∈ 𝐴)
55		sticksstones9.3	. 2 ⊢ 𝐺 = (𝑏 ∈ 𝐵 ↦ if(𝐾 = 0, {⟨1, 𝑁⟩}, (𝑘 ∈ (1...(𝐾 + 1)) ↦ if(𝑘 = (𝐾 + 1), ((𝑁 + 𝐾) − (𝑏‘𝐾)), if(𝑘 = 1, ((𝑏‘1) − 1), (((𝑏‘𝑘) − (𝑏‘(𝑘 − 1))) − 1))))))
56	54, 55	fmptd 7118	1 ⊢ (𝜑 → 𝐺:𝐵⟶𝐴)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∈ wcel 2099 {cab 2704 ∀wral 3056 Vcvv 3469 ⊆ wss 3944 ifcif 4524 {csn 4624 ⟨cop 4630 class class class wbr 5142 ↦ cmpt 5225 ⟶wf 6538 ‘cfv 6542 (class class class)co 7414 ℂcc 11128 0cc0 11130 1c1 11131 + caddc 11133 < clt 11270 − cmin 11466 ℕcn 12234 ℕ₀cn0 12494 ℤcz 12580 ...cfz 13508 Σcsu 15656

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-inf2 9656 ax-cnex 11186 ax-resscn 11187 ax-1cn 11188 ax-icn 11189 ax-addcl 11190 ax-addrcl 11191 ax-mulcl 11192 ax-mulrcl 11193 ax-mulcom 11194 ax-addass 11195 ax-mulass 11196 ax-distr 11197 ax-i2m1 11198 ax-1ne0 11199 ax-1rid 11200 ax-rnegex 11201 ax-rrecex 11202 ax-cnre 11203 ax-pre-lttri 11204 ax-pre-lttrn 11205 ax-pre-ltadd 11206 ax-pre-mulgt0 11207 ax-pre-sup 11208

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-rmo 3371 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-se 5628 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-er 8718 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-sup 9457 df-oi 9525 df-card 9954 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11468 df-neg 11469 df-div 11894 df-nn 12235 df-2 12297 df-3 12298 df-n0 12495 df-z 12581 df-uz 12845 df-rp 12999 df-fz 13509 df-fzo 13652 df-seq 13991 df-exp 14051 df-hash 14314 df-cj 15070 df-re 15071 df-im 15072 df-sqrt 15206 df-abs 15207 df-clim 15456 df-sum 15657

This theorem is referenced by: sticksstones11 41560

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