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Definition df-wspthsn 26628
Description: Define the collection of simple paths of a fixed length as word over the set of vertices. (Contributed by Alexander van der Vekens, 1-Mar-2018.) (Revised by AV, 11-May-2021.)
Assertion
Ref Expression
df-wspthsn WSPathsN = (𝑛 ∈ ℕ0, 𝑔 ∈ V ↦ {𝑤 ∈ (𝑛 WWalksN 𝑔) ∣ ∃𝑓 𝑓(SPaths‘𝑔)𝑤})
Distinct variable group:   𝑓,𝑔,𝑛,𝑤

Detailed syntax breakdown of Definition df-wspthsn
StepHypRef Expression
1 cwwspthsn 26623 . 2 class WSPathsN
2 vn . . 3 setvar 𝑛
3 vg . . 3 setvar 𝑔
4 cn0 11252 . . 3 class 0
5 cvv 3190 . . 3 class V
6 vf . . . . . . 7 setvar 𝑓
76cv 1479 . . . . . 6 class 𝑓
8 vw . . . . . . 7 setvar 𝑤
98cv 1479 . . . . . 6 class 𝑤
103cv 1479 . . . . . . 7 class 𝑔
11 cspths 26512 . . . . . . 7 class SPaths
1210, 11cfv 5857 . . . . . 6 class (SPaths‘𝑔)
137, 9, 12wbr 4623 . . . . 5 wff 𝑓(SPaths‘𝑔)𝑤
1413, 6wex 1701 . . . 4 wff 𝑓 𝑓(SPaths‘𝑔)𝑤
152cv 1479 . . . . 5 class 𝑛
16 cwwlksn 26621 . . . . 5 class WWalksN
1715, 10, 16co 6615 . . . 4 class (𝑛 WWalksN 𝑔)
1814, 8, 17crab 2912 . . 3 class {𝑤 ∈ (𝑛 WWalksN 𝑔) ∣ ∃𝑓 𝑓(SPaths‘𝑔)𝑤}
192, 3, 4, 5, 18cmpt2 6617 . 2 class (𝑛 ∈ ℕ0, 𝑔 ∈ V ↦ {𝑤 ∈ (𝑛 WWalksN 𝑔) ∣ ∃𝑓 𝑓(SPaths‘𝑔)𝑤})
201, 19wceq 1480 1 wff WSPathsN = (𝑛 ∈ ℕ0, 𝑔 ∈ V ↦ {𝑤 ∈ (𝑛 WWalksN 𝑔) ∣ ∃𝑓 𝑓(SPaths‘𝑔)𝑤})
Colors of variables: wff setvar class
This definition is referenced by:  wspthsn  26638  wspthnp  26640  wspn0  26723
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