sticksstones9 - Mathbox for metakunt

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Theorem sticksstones9 41678

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 4533	. . . 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 479	. . 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 2725	. . . . . . . . . . 11 ⊢ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}
5		1nn 12248	. . . . . . . . . . . . 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 582	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:{1}⟶{𝑁} ↔ {⟨1, 𝑁⟩} = {⟨1, 𝑁⟩}))
10	4, 9	mpbiri 257	. . . . . . . . . 10 ⊢ (𝜑 → {⟨1, 𝑁⟩}:{1}⟶{𝑁})
11	7	snssd 4809	. . . . . . . . . 10 ⊢ (𝜑 → {𝑁} ⊆ ℕ₀)
12	10, 11	jca 510	. . . . . . . . 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 7428	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐾 + 1) = (0 + 1))
16		0p1e1 12359	. . . . . . . . . . . . 13 ⊢ (0 + 1) = 1
17	15, 16	eqtrdi 2781	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐾 + 1) = 1)
18	17	oveq2d 7429	. . . . . . . . . . 11 ⊢ (𝜑 → (1...(𝐾 + 1)) = (1...1))
19		1zzd 12618	. . . . . . . . . . . 12 ⊢ (𝜑 → 1 ∈ ℤ)
20		fzsn 13570	. . . . . . . . . . . 12 ⊢ (1 ∈ ℤ → (1...1) = {1})
21	19, 20	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → (1...1) = {1})
22	18, 21	eqtrd 2765	. . . . . . . . . 10 ⊢ (𝜑 → (1...(𝐾 + 1)) = {1})
23	22	eqcomd 2731	. . . . . . . . 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 15674	. . . . . . . 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 582	. . . . . . . . . . . 12 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
29	7	nn0cnd 12559	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℂ)
30	28, 29	eqeltrd 2825	. . . . . . . . . . 11 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) ∈ ℂ)
31	6, 30	jca 510	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ ({⟨1, 𝑁⟩}‘1) ∈ ℂ))
32		fveq2 6890	. . . . . . . . . . 11 ⊢ (𝑖 = 1 → ({⟨1, 𝑁⟩}‘𝑖) = ({⟨1, 𝑁⟩}‘1))
33	32	sumsn 15719	. . . . . . . . . 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 510	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℕ ∧ 𝑁 ∈ ℕ₀))
36	35, 27	syl 17	. . . . . . . . 9 ⊢ (𝜑 → ({⟨1, 𝑁⟩}‘1) = 𝑁)
37	34, 36	eqtrd 2765	. . . . . . . 8 ⊢ (𝜑 → Σ𝑖 ∈ {1} ({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
38	26, 37	eqtrd 2765	. . . . . . 7 ⊢ (𝜑 → Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁)
39	25, 38	jca 510	. . . . . 6 ⊢ (𝜑 → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
40	39	adantr 479	. . . . 5 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → ({⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀ ∧ Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖) = 𝑁))
41		snex 5428	. . . . . 6 ⊢ {⟨1, 𝑁⟩} ∈ V
42		feq1 6698	. . . . . . . 8 ⊢ (𝑔 = {⟨1, 𝑁⟩} → (𝑔:(1...(𝐾 + 1))⟶ℕ₀ ↔ {⟨1, 𝑁⟩}:(1...(𝐾 + 1))⟶ℕ₀))
43		simpl 481	. . . . . . . . . . 11 ⊢ ((𝑔 = {⟨1, 𝑁⟩} ∧ 𝑖 ∈ (1...(𝐾 + 1))) → 𝑔 = {⟨1, 𝑁⟩})
44	43	fveq1d 6892	. . . . . . . . . 10 ⊢ ((𝑔 = {⟨1, 𝑁⟩} ∧ 𝑖 ∈ (1...(𝐾 + 1))) → (𝑔‘𝑖) = ({⟨1, 𝑁⟩}‘𝑖))
45	44	sumeq2dv 15676	. . . . . . . . 9 ⊢ (𝑔 = {⟨1, 𝑁⟩} → Σ𝑖 ∈ (1...(𝐾 + 1))(𝑔‘𝑖) = Σ𝑖 ∈ (1...(𝐾 + 1))({⟨1, 𝑁⟩}‘𝑖))
46	45	eqeq1d 2727	. . . . . . . 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 3659	. . . . . 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 2828	. . 3 ⊢ ((𝜑 ∧ 𝑏 ∈ 𝐵) → {⟨1, 𝑁⟩} ∈ 𝐴)
54	3, 53	eqeltrd 2825	. 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 7117	1 ⊢ (𝜑 → 𝐺:𝐵⟶𝐴)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 = wceq 1533 ∈ wcel 2098 {cab 2702 ∀wral 3051 Vcvv 3463 ⊆ wss 3941 ifcif 4525 {csn 4625 ⟨cop 4631 class class class wbr 5144 ↦ cmpt 5227 ⟶wf 6539 ‘cfv 6543 (class class class)co 7413 ℂcc 11131 0cc0 11133 1c1 11134 + caddc 11136 < clt 11273 − cmin 11469 ℕcn 12237 ℕ₀cn0 12497 ℤcz 12583 ...cfz 13511 Σcsu 15659

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-rep 5281 ax-sep 5295 ax-nul 5302 ax-pow 5360 ax-pr 5424 ax-un 7735 ax-inf2 9659 ax-cnex 11189 ax-resscn 11190 ax-1cn 11191 ax-icn 11192 ax-addcl 11193 ax-addrcl 11194 ax-mulcl 11195 ax-mulrcl 11196 ax-mulcom 11197 ax-addass 11198 ax-mulass 11199 ax-distr 11200 ax-i2m1 11201 ax-1ne0 11202 ax-1rid 11203 ax-rnegex 11204 ax-rrecex 11205 ax-cnre 11206 ax-pre-lttri 11207 ax-pre-lttrn 11208 ax-pre-ltadd 11209 ax-pre-mulgt0 11210 ax-pre-sup 11211

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3961 df-nul 4320 df-if 4526 df-pw 4601 df-sn 4626 df-pr 4628 df-op 4632 df-uni 4905 df-int 4946 df-iun 4994 df-br 5145 df-opab 5207 df-mpt 5228 df-tr 5262 df-id 5571 df-eprel 5577 df-po 5585 df-so 5586 df-fr 5628 df-se 5629 df-we 5630 df-xp 5679 df-rel 5680 df-cnv 5681 df-co 5682 df-dm 5683 df-rn 5684 df-res 5685 df-ima 5686 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 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 7369 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7866 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 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-sup 9460 df-oi 9528 df-card 9957 df-pnf 11275 df-mnf 11276 df-xr 11277 df-ltxr 11278 df-le 11279 df-sub 11471 df-neg 11472 df-div 11897 df-nn 12238 df-2 12300 df-3 12301 df-n0 12498 df-z 12584 df-uz 12848 df-rp 13002 df-fz 13512 df-fzo 13655 df-seq 13994 df-exp 14054 df-hash 14317 df-cj 15073 df-re 15074 df-im 15075 df-sqrt 15209 df-abs 15210 df-clim 15459 df-sum 15660

This theorem is referenced by: sticksstones11 41680

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