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Convergence

convergence

Problem-solving strategies for convergence in real analysis

SKILL.md

Full skill instructions

Convergence

When to Use

Use this skill when working on convergence problems in real analysis.

Decision Tree

  1. Identify Sequence/​Series Type

    • Geometric series: |r| < 1 converges
    • p-series: p > 1 converges
    • Alternating series: check decreasing + limit 0
  2. Apply Convergence Tests

    • Ratio test: sympy_compute.py limit "a_{n+1}/​a_n"
    • Root test: sympy_compute.py limit "a_n^(1/​n)"
    • Comparison test: find bounding series
  3. Verify Bounds

    • Use z3_solve.py prove for inequality bounds
    • Check monotonicity with derivatives
  4. Compute Sum (if convergent)

    • sympy_compute.py sum "a_n" --var n --from 0 --to oo

Tool Commands

Sympy_Limit

uv run python -m runtime.harness scripts/​sympy_compute.py limit "a_n" --var n --at oo

Sympy_Sum

uv run python -m runtime.harness scripts/​sympy_compute.py sum "1/​n**2" --var n --from 1 --to oo

Z3_Prove

uv run python -m runtime.harness scripts/​z3_solve.py prove "series_bounded"

Cognitive Tools Reference

See .claude/​skills/​math-mode/​SKILL.md for full tool documentation.

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