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Edge Endpoint Degree Product Tool

Calculate edge endpoint degree product from explicit caller-supplied inputs.

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Description

Require nonnegative integer firstDegree and secondDegree and return their exact product as productDecimal.

A graph's degree records how many edge incidences meet a vertex. Directed edges distinguish incoming and outgoing incidences, while loops and parallel edges require explicit counting conventions; a local degree formula does not reconstruct a graph.

Require nonnegative integer firstDegree and secondDegree and return their exact product as productDecimal.

When to use this tool

Use Edge Endpoint Degree Product when you need a degree or incidence calculation under the stated graph convention.

How to use the tool and how it works

  1. Enter firstDegree, secondDegree. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read productDecimal. Use the output convention below.

Require nonnegative integer firstDegree and secondDegree and return their exact product as productDecimal.1

Input fieldMeaning and unitsAccepted input
firstDegreeFirst DegreeRequired. Safe integer; minimum 0.
secondDegreeSecond DegreeRequired. Safe integer; minimum 0.
Output fieldInterpretationReturned shape
productDecimalProduct DecimalRequired. Text; maximum UTF-16 length 8192.
json
{
  "input": {
    "firstDegree": 3,
    "secondDegree": 5
  },
  "output": {
    "productDecimal": "15"
  }
}

Limitations and assumptions

  • Keep the output as a decimal string when precision matters; the degrees are supplied and no graph-wide index, edge existence, or topology is verified.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Build an adjacency structure and count actual incidences when a full graph is available. Validate loop, multiplicity, direction, and vertex-set assumptions before applying a simple-graph identity.

References

  1. Calculation and input contract: graph/edge-endpoint-degree-product — tool.io

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