FirstRowSum

The sum of the first row.

✓ checked against that system · ! checked, with disagreements (hover a chip)FindStatSt001456via PlanePartition✓↗

FirstRowSum(planePartition)The sum of the first row.

Typed signatures

Type	Package	Applies
(plane_partition) -> number	combinatorics	always

Domain: Plane partition statistics

Details

• Defined over PlanePartition as an expression in _x, evaluated by compute-engine — the definition IS the implementation.
• Takes a PlanePartition and nothing else — it reads values against their positions, or walks the orbits, so it needs the bijection. Applying it to a bare list is a type error, not a wrong answer.
• FindStat's St001456.

Definition

Epsil, as the implementation runs it.

on PlanePartition, over _x

0 if Length(Flatten(_x)) < 1 else Apply((reading: list<integer>) => Apply(
                                                                           (lengths: list<integer>) => Max(Sum(Map(Function(reading[j], j), Range(1, lengths[1], 1))), 0),
                                                                           Map(
                                                                                Function(Length(r), r),
                                                                                _x,
                                                                              ),
                                                                         ), Flatten(_x))

Examples

Basic #

the plane partition $[[4,3,1],[3,1],[1]]$

live ↗

In$\mathrm{FirstRowSum}({\operatorname{PlanePartition}}([[4, 3, 1], [3, 1], [1]]))$Out$8$

Properties #

FindStat's value for [[1]]

live ↗

In$\mathrm{CombinatorialStat}({\operatorname{PlanePartition}}([[1]]), \text{FirstRowSum})$Out$1$

Known value · FindStat St001456

FindStat's value for [[2]]

live ↗

In$\mathrm{CombinatorialStat}({\operatorname{PlanePartition}}([[2]]), \text{FirstRowSum})$Out$2$

Known value · FindStat St001456

FindStat's value for [[3]]

live ↗

In$\mathrm{CombinatorialStat}({\operatorname{PlanePartition}}([[3]]), \text{FirstRowSum})$Out$3$

Known value · FindStat St001456

About

Examples	4
Crosswalk	FindStat