sticksstones9 - Mathbox for metakunt

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Theorem sticksstones9 40965

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 4536	. . . 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 481	. . 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 2732	. . . . . . . . . . 11 ⊢ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}
5		1nn 12222	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℕ
6	5	a1i 11	. . . . . . . . . . . 12 ⊢ (𝜑 → 1 ∈ ℕ)
7		sticksstones9.1	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
8		fsng 7134	. . . . . . . . . . . 12 ⊢ ((1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀) → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ↔ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}))
9	6, 7, 8	syl2anc 584	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ↔ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}))
10	4, 9	mpbiri 257	. . . . . . . . . 10 ⊢ (𝜑 → {⟨1, 𝑁⟩}:{1}⟶{𝑁})
11	7	snssd 4812	. . . . . . . . . 10 ⊢ (𝜑 → {𝑁} ⊆ ℕ₀)
12	10, 11	jca 512	. . . . . . . . 9 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ∧ {𝑁} ⊆ ℕ₀))
13		fss 6734	. . . . . . . . 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 7423	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐾 + 1) = (0 + 1))
16		0p1e1 12333	. . . . . . . . . . . . 13 ⊢ (0 + 1) = 1
17	15, 16	eqtrdi 2788	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐾 + 1) = 1)
18	17	oveq2d 7424	. . . . . . . . . . 11 ⊢ (𝜑 → (1...(𝐾 + 1)) = (1...1))
19		1zzd 12592	. . . . . . . . . . . 12 ⊢ (𝜑 → 1 ∈ ℤ)
20		fzsn 13542	. . . . . . . . . . . 12 ⊢ (1 ∈ ℤ → (1...1) = {1})
21	19, 20	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → (1...1) = {1})
22	18, 21	eqtrd 2772	. . . . . . . . . 10 ⊢ (𝜑 → (1...(𝐾 + 1)) = {1})
23	22	eqcomd 2738	. . . . . . . . 9 ⊢ (𝜑 → {1} = (1...(𝐾 + 1)))
24	23	feq2d 6703	. . . . . . . 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 15646	. . . . . . . 8 ⊢ (𝜑 → Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖))
27		fvsng 7177	. . . . . . . . . . . . 13 ⊢ ((1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀) → ({⟨1, 𝑁⟩}‘1) = 𝑁)
28	6, 7, 27	syl2anc 584	. . . . . . . . . . . 12 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
29	7	nn0cnd 12533	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℂ)
30	28, 29	eqeltrd 2833	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) ∈ ℂ)
31	6, 30	jca 512	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ ({⟨1, 𝑁⟩}‘1) ∈ ℂ))
32		fveq2 6891	. . . . . . . . . . 11 ⊢ (𝑖 = 1 → ({⟨1, 𝑁⟩}‘𝑖) = ({⟨1, 𝑁⟩}‘1))
33	32	sumsn 15691	. . . . . . . . . 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 512	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀))
36	35, 27	syl 17	. . . . . . . . 9 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
37	34, 36	eqtrd 2772	. . . . . . . 8 ⊢ (𝜑 → Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
38	26, 37	eqtrd 2772	. . . . . . 7 ⊢ (𝜑 → Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
39	25, 38	jca 512	. . . . . 6 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
40	39	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
41		snex 5431	. . . . . 6 ⊢ {⟨1, 𝑁⟩} ∈ V
42		feq1 6698	. . . . . . . 8 ⊢ (𝑔 = {⟨1, 𝑁⟩} → (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ↔ {⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀))
43		simpl 483	. . . . . . . . . . 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 15648	. . . . . . . . 9 ⊢ (𝑔 = {⟨1, 𝑁⟩} → Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖))
46	45	eqeq1d 2734	. . . . . . . 8 ⊢ (𝑔 = {⟨1, 𝑁⟩} → (Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = 𝑁 ↔ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
47	42, 46	anbi12d 631	. . . . . . 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 3666	. . . . . 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 2836	. . 3 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → {⟨1, 𝑁⟩} ∈ 𝐴)
54	3, 53	eqeltrd 2833	. 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 7113	1 ⊢ (𝜑 → 𝐺:𝐵⟶𝐴)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 {cab 2709 ∀wral 3061 Vcvv 3474 ⊆ wss 3948 ifcif 4528 {csn 4628 ⟨cop 4634 class class class wbr 5148 ↦ cmpt 5231 ⟶wf 6539 ‘cfv 6543 (class class class)co 7408 ℂcc 11107 0cc0 11109 1c1 11110 + caddc 11112 < clt 11247 − cmin 11443 ℕcn 12211 ℕ₀cn0 12471 ℤcz 12557 ...cfz 13483 Σcsu 15631

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-inf2 9635 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7855 df-1st 7974 df-2nd 7975 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-1o 8465 df-er 8702 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-sup 9436 df-oi 9504 df-card 9933 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-div 11871 df-nn 12212 df-2 12274 df-3 12275 df-n0 12472 df-z 12558 df-uz 12822 df-rp 12974 df-fz 13484 df-fzo 13627 df-seq 13966 df-exp 14027 df-hash 14290 df-cj 15045 df-re 15046 df-im 15047 df-sqrt 15181 df-abs 15182 df-clim 15431 df-sum 15632

This theorem is referenced by: sticksstones11 40967

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