sticksstones9 - Mathbox for metakunt

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Theorem sticksstones9 40970

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 4537	. . . 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 482	. . 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 2733	. . . . . . . . . . 11 ⊢ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}
5		1nn 12223	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℕ
6	5	a1i 11	. . . . . . . . . . . 12 ⊢ (𝜑 → 1 ∈ ℕ)
7		sticksstones9.1	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
8		fsng 7135	. . . . . . . . . . . 12 ⊢ ((1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀) → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ↔ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}))
9	6, 7, 8	syl2anc 585	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ↔ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}))
10	4, 9	mpbiri 258	. . . . . . . . . 10 ⊢ (𝜑 → {⟨1, 𝑁⟩}:{1}⟶{𝑁})
11	7	snssd 4813	. . . . . . . . . 10 ⊢ (𝜑 → {𝑁} ⊆ ℕ₀)
12	10, 11	jca 513	. . . . . . . . 9 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ∧ {𝑁} ⊆ ℕ₀))
13		fss 6735	. . . . . . . . 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 7424	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐾 + 1) = (0 + 1))
16		0p1e1 12334	. . . . . . . . . . . . 13 ⊢ (0 + 1) = 1
17	15, 16	eqtrdi 2789	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐾 + 1) = 1)
18	17	oveq2d 7425	. . . . . . . . . . 11 ⊢ (𝜑 → (1...(𝐾 + 1)) = (1...1))
19		1zzd 12593	. . . . . . . . . . . 12 ⊢ (𝜑 → 1 ∈ ℤ)
20		fzsn 13543	. . . . . . . . . . . 12 ⊢ (1 ∈ ℤ → (1...1) = {1})
21	19, 20	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → (1...1) = {1})
22	18, 21	eqtrd 2773	. . . . . . . . . 10 ⊢ (𝜑 → (1...(𝐾 + 1)) = {1})
23	22	eqcomd 2739	. . . . . . . . 9 ⊢ (𝜑 → {1} = (1...(𝐾 + 1)))
24	23	feq2d 6704	. . . . . . . 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 15647	. . . . . . . 8 ⊢ (𝜑 → Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖))
27		fvsng 7178	. . . . . . . . . . . . 13 ⊢ ((1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀) → ({⟨1, 𝑁⟩}‘1) = 𝑁)
28	6, 7, 27	syl2anc 585	. . . . . . . . . . . 12 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
29	7	nn0cnd 12534	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℂ)
30	28, 29	eqeltrd 2834	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) ∈ ℂ)
31	6, 30	jca 513	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ ({⟨1, 𝑁⟩}‘1) ∈ ℂ))
32		fveq2 6892	. . . . . . . . . . 11 ⊢ (𝑖 = 1 → ({⟨1, 𝑁⟩}‘𝑖) = ({⟨1, 𝑁⟩}‘1))
33	32	sumsn 15692	. . . . . . . . . 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 513	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀))
36	35, 27	syl 17	. . . . . . . . 9 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
37	34, 36	eqtrd 2773	. . . . . . . 8 ⊢ (𝜑 → Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
38	26, 37	eqtrd 2773	. . . . . . 7 ⊢ (𝜑 → Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
39	25, 38	jca 513	. . . . . 6 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
40	39	adantr 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
41		snex 5432	. . . . . 6 ⊢ {⟨1, 𝑁⟩} ∈ V
42		feq1 6699	. . . . . . . 8 ⊢ (𝑔 = {⟨1, 𝑁⟩} → (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ↔ {⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀))
43		simpl 484	. . . . . . . . . . 11 ⊢ ((𝑔 = {⟨1, 𝑁⟩} ∧ 𝑖 ∈ (1...(𝐾 + 1))) → 𝑔 = {⟨1, 𝑁⟩})
44	43	fveq1d 6894	. . . . . . . . . 10 ⊢ ((𝑔 = {⟨1, 𝑁⟩} ∧ 𝑖 ∈ (1...(𝐾 + 1))) → (𝑔‘𝑖) = ({⟨1, 𝑁⟩}‘𝑖))
45	44	sumeq2dv 15649	. . . . . . . . 9 ⊢ (𝑔 = {⟨1, 𝑁⟩} → Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖))
46	45	eqeq1d 2735	. . . . . . . 8 ⊢ (𝑔 = {⟨1, 𝑁⟩} → (Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁 ↔ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
47	42, 46	anbi12d 632	. . . . . . 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 3667	. . . . . 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 2837	. . 3 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → {⟨1, 𝑁⟩} ∈ 𝐴)
54	3, 53	eqeltrd 2834	. 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 7114	1 ⊢ (𝜑 → 𝐺:𝐵⟶𝐴)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 {cab 2710 ∀wral 3062 Vcvv 3475 ⊆ wss 3949 ifcif 4529 {csn 4629 ⟨cop 4635 class class class wbr 5149 ↦ cmpt 5232 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 0cc0 11110 1c1 11111 + caddc 11113 < clt 11248 − cmin 11444 ℕcn 12212 ℕ₀cn0 12472 ℤcz 12558 ...cfz 13484 Σcsu 15632

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9437 df-oi 9505 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-rp 12975 df-fz 13485 df-fzo 13628 df-seq 13967 df-exp 14028 df-hash 14291 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-clim 15432 df-sum 15633

This theorem is referenced by: sticksstones11 40972

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