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ADDITIVE PARTITIONS / UNIQUE PARTS

Distinct-Part Partition Calculator

Count unordered partitions of a nonnegative integer using each positive part at most once. Review the bounded integer domain, method trace, and verification evidence with the result.

  • 01 Calculated in this tab
  • 02 Values stay in this browser tab
  • 03 Use boundary

Conversion input

Known value

Filter by unit name, symbol, or code. Your current selections remain available.

Preparing the calculator...

METHOD / WORKED EXAMPLE

Audit the Distinct-Part Partition result step by step

Count unordered partitions of a nonnegative integer using each positive part at most once. The result panel preserves the defining recurrence, residue, or counting identity so the output can be checked without trusting an unexplained number.

WORKED DEFAULT

Check the calculation with the default inputs

For n = 10 there are 10 distinct-part partitions, including 10, 9+1, 8+2, 7+3, and 7+2+1.

  1. Set targetn = 10
  2. Use each part onceUpdate totals in descending order
  3. Read count10 distinct-part partitions

READ THE RESULT

Interpret the output in context

The result is smaller than or equal to the unrestricted partition count because repeated parts such as 5+5 are excluded.

ASSUMPTIONS AND LIMITS

Know where the model stops

  • Parts are positive integers.
  • Order is ignored and each part may occur no more than once.

The target is capped at 100 to keep dynamic-programming work and integer output predictable in the browser.

COMMON QUESTIONS

Distinct-Part Partition Calculator FAQs

What definition does Distinct-Part Partition Calculator use?

Initialize one empty partition at zero, then update totals in descending order for each candidate positive part. This route excludes repeated parts but still treats reordered sums as the same partition. Inputs remain whole numbers inside the displayed domain, and the page never rounds a decimal into an accepted integer. This keeps the reported result tied to one explicit mathematical definition rather than an unstated convention.

How can I verify the Distinct-Part Partition output?

The result is smaller than or equal to the unrestricted partition count because repeated parts such as 5+5 are excluded. List the decompositions for a small target and confirm that no positive part repeats. Reuse the displayed recurrence, congruence, or counting identity with the same inputs. The verification evidence checks this calculator's result, but it does not establish assumptions or conclusions outside the stated mathematical domain.

Why is the Distinct-Part Partition input bounded?

The target is capped at 100 to keep dynamic-programming work and integer output predictable in the browser. The cap avoids extending a browser table into unsupported large-count work. A finite limit prevents browser stalls and avoids presenting an unsafe floating-point integer as exact. Work beyond that limit belongs in arbitrary-precision software with explicit resource controls and independent validation.

Use boundary

Calculation path

Initialize one empty partition at zero, then update totals in descending order for each candidate positive part.

Calculation path

Update counts downward so each part contributes at most once.