Combinatorics formula reference

Pigeonhole Principle Bound

Guarantees that at least one of m containers holds at least the ceiling of N divided by m objects.

Open in editor
LaTeX\max_i n_i\ge\left\lceil\frac{N}{m}\right\rceil

Variables

  • N: total number of objects
  • m: number of containers
  • n_i: occupancy of container i

How to use this formula

Guarantees that at least one of m containers holds at least the ceiling of N divided by m objects.

Important notes

  • The principle guarantees existence but does not identify the container.
  • Containers and assignments must be clearly defined.

Quick example

Placing 13 objects into 4 boxes guarantees one box contains at least 4 objects.

Applicability, worked calculation, and verification

Assumptions and domain checks

  • The principle guarantees existence but does not identify the container.
  • For the Pigeonhole Principle Bound, every denominator must be nonzero, and the numerator and denominator must remain correctly grouped.
  • Define whether selections are ordered, repeated, labeled, or constrained before applying the counting formula.

Worked example

Input

Output

Placing 13 objects into 4 boxes guarantees one box contains at least 4 objects.

Common mistakes

  • When copying Pigeonhole Principle Bound, keep the complete numerator and denominator grouped; a missing brace or parenthesis changes the result.
  • Verify the result of Pigeonhole Principle Bound with a known case, inverse operation, dimensional check, or independent calculation before publishing it.

Continue the workflow

Use Pigeonhole Principle Bound in your own work

  1. Check the domainMatch the variables and assumptions to the problem before substituting values.
  2. Copy the exact notationPreserve grouping, signs, and exponents in \max_i n_i\ge\left\lceil\frac{N}{m}\right\rceil.
  3. Edit or convertOpen the expression in the LaTeX editor, then export it for your document or web page.

Review and verification

Last reviewed: 2026-07-23

Automated quality check: Kept noindex until the missing evidence is supplied.

Formula references

Frequently asked questions

What is the Pigeonhole Principle Bound used for?

Guarantees that at least one of m containers holds at least the ceiling of N divided by m objects.

Can I copy this formula as LaTeX?

Yes. Copy \max_i n_i\ge\left\lceil\frac{N}{m}\right\rceil or open it in the LaTeX editor.

What should I check before using it?

Confirm that each variable, unit, domain restriction, and assumption matches the problem.

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