---
title: "Small User’s Math (SUM)"
id: 27755
type: "product"
slug: "small-users-math"
url: "http://localhost/product/small-users-math/"
markdown_url: "http://localhost/product/small-users-math.md"
published_at: "2020-10-18T20:30:08+00:00"
modified_at: "2026-03-22T19:36:35+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Compendium of numerical programs for the small system user. Equations to handle first and second order differential equations, matrix eigenvalue/vector solution, curve fitting and cubic spline routines, determinants, matrix inversions, Laplace/Poisson equation, heat or molecular diffusion and more."
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  - name: "Math/Science"
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  - name: "Ken D. Lewis (company)"
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    url: "http://localhost/tag/ken-lewis/"
  - name: "TS 1000"
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    url: "http://localhost/tag/ts1000/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
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    url: "http://localhost/model/ts-1000/"
genre:
  - name: "Mathematics"
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    taxonomy: "genre"
    url: "http://localhost/type/mathematics/"
  - name: "Software"
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    taxonomy: "genre"
    url: "http://localhost/type/software/"
company:
  id: 27754
  title: "Ken Lewis"
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  url: "http://localhost/company/ken-lewis/"
price: 15
rarity: "Uncommon"
adverts:
  - publication:
      - id: 26856
        title: "T-S Horizons n12"
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companies_products:
  - id: 27754
    title: "Ken Lewis"
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---

# Small User’s Math (SUM)

Compendium of numerical programs for the small system user. Equations to handle first and second order differential equations, matrix eigenvalue/vector solution, curve fitting and cubic spline routines, determinants, matrix inversions, Laplace/Poisson equation, heat or molecular diffusion and more.