mathlib-fp2.3.1
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Choosing a Pascal numerical library

Reviewed 3 October 2026. This is a representative shortlist of Pascal math libraries and Pascal-facing numerical packages, not a benchmark or a claim of complete compatibility across every compiler and platform. The GitHub-hosted projects are listed first; established projects distributed through other upstream channels follow. Check each upstream project for its current release, compiler support, and license when evaluating it for a project.

GitHub-hosted projects

Project License and compiler Areas of strength Notes
mrMath Apache-2.0; Delphi and Free Pascal source Dense linear algebra (LU, QR, Cholesky, SVD), statistics, dimensionality reduction, wavelets, and threaded matrix operations A broad matrix and machine-learning toolkit, with hand-optimized assembly, AVX, and FMA paths. Its documentation describes target-specific builds and setup.
numerik MIT; Object Pascal with a Lazarus package NumPy-like TMultiArray, broadcasting, slicing, array operations, matrix multiplication, and SVD Brings multidimensional-array semantics to Object Pascal; can use OpenBLAS/LAPACK for BLAS acceleration.
pas-core-math MIT; Free Pascal 3.2.2+ CORE-MATH scalar functions for binary32 and binary64, with correctly-rounded results as the design goal A specialist project for high-quality scalar math, with an x86-64 Linux focus.
FastMath Simplified BSD; Delphi Single-precision scalar operations, 2D/3D/4D vectors, small matrices, and quaternions Designed for graphics and SIMD workloads. Its Fast* routines make speed-oriented approximations available as a distinct choice.
CAI Neural API LGPL-2.1 with a custom linking exception; current master targets Free Pascal/Lazarus, and Delphi users are directed to tag v2.0.0 Neural-network training and inference, with AVX/AVX2/AVX512 CPU paths and optional OpenCL A dedicated machine-learning API with CPU and GPU acceleration paths; the project provides a Delphi-compatible release tag alongside its current FPC branch.
MPArith Free Pascal and Delphi source; terms are in copying_we.txt Arbitrary-precision integer, rational, real, and complex arithmetic A multiprecision collection with test programs, demos, and calculator examples alongside its numeric units.
mathlib-fp 2.3.1 MIT; native Free Pascal source (FPC 3.2.2+) 13 focused domains spanning algebra, probability, statistics, engineering/DSP, numerics, optimisation, time series, machine learning, finance, geometry, and interchange A broad, FPC-first toolkit with no mandatory third-party numerical runtime, versioned web/offline docs, runnable learning examples, a capability inventory, and release qualification. It uses FPC's objfpc dialect and does not claim Delphi compatibility.

Specialized GitHub projects

These projects focus on precision-specific arithmetic needs.

Project License and compiler Areas of strength Notes
TIntX MIT; Free Pascal 3.0+ and Delphi 2010+ Arbitrary-precision integers, including fast multiplication, division, and base conversion A focused big-integer library with transform-based fast algorithms and support for both major Pascal compiler families.
BigDecimalMath LCL-style LGPL with an explicit linking exception in the source; Free Pascal objfpc mode Arbitrary-precision BCD floating point, arithmetic, rounding, square root, and power Provides decimal multiprecision operations in an Object Pascal unit.
DelphiBigNumbers BSD-2-Clause; Delphi-first Arbitrary-precision integer, decimal, and rational types Combines assembly optimizations with pure-Pascal equivalents. The author's notes also describe an FPC build using PUREPASCAL and small unit-name adjustments.

The DFF Library is another community-catalogued resource, with material on big floating-point values, big integers, and astronomical calculations. Its community listing links to the upstream collection.

Project License and compiler Areas of strength Notes
FPC NumLib Included in the FPC distribution; package notices use the FPC modified-LGPL linking exception Classic routines for determinants, eigenvalues, integration, ODEs, roots, linear systems, special functions, and splines A long-standing part of the FPC ecosystem, derived from Eindhoven NUMLIB work. Its configurable ArbFloat and flat-array/pointer-overlay interfaces offer low-level control. The upstream source is on GitLab.
DMath LGPL-2.0; Delphi, FPC, and Lazarus builds are listed by the project Scientific routines including special functions, distributions, linear algebra, optimisation, integration/ODEs, FFT, random numbers, and regression A broad scientific collection with an established history; LMath extends its procedural core for Free Pascal and Lazarus.
JEDI Math MPL-1.1; project lists Delphi, Kylix, FPC, and Lazarus Matrices/vectors, regression, geometry, physics, equation rendering, and ray tracing A community project spanning mathematical and graphical areas, including tools for physics and visualization.
LMath Mostly LGPL-3.0; the lmDSP package is identified as GPL; Free Pascal/Lazarus Numerical analysis, probabilities, matrices, optimisation, equations, integration, FFT, regression, statistics, graphics, and components Source-only Pascal with Lazarus packages and no external library requirement. SourceForge lists version 0.6.1 and an update in October 2025; package-specific license notices identify the terms for each component.
OptiVec Commercial; compiler-specific Delphi products and a Lazarus/Free Pascal product for 64-bit Windows; 90-day trial Vendor describes 4,000+ vector, matrix, and complex functions, plus statistics, FFT, fitting, interpolation, and matrix decompositions A vendor-supported, performance-oriented engineering and scientific toolkit with hand-optimized routines. The vendor lists version 8.4.3.
AMath and DAMath Permissive terms stated in the source distribution; Delphi and FPC source Elementary and special functions, distributions, quadrature, root finding, and complex functions A specialist collection with function-level reference material and implementation notes.
MtxVec Core Edition Commercial; full-source Delphi edition, with separate C++/.NET products Dense vector/matrix numerics, statistics, and signal processing A supported commercial Delphi option; Core Edition can be built without external DLLs.
ALGLIB for Delphi Free Delphi/FPC edition is for personal and academic use; commercial edition is available Broad optimization, interpolation, linear algebra, FFT, statistics, and data-analysis algorithms A wide algorithm catalog with Pascal interfaces to a C core; the free Delphi edition includes precompiled binaries.

Position

mathlib-fp is intended as a general-purpose numerical library for Free Pascal with four deliberate characteristics: an MIT licence with no paid tier, a complete implementation in Object Pascal source within this repository, no mandatory third-party numerical runtime, and documentation and qualification material organised as a learning path. It is designed as an FPC-first, Lazarus-focused project. These describe mathlib-fp's approach; other projects bring strengths in areas such as SIMD performance, multi-precision arithmetic, array semantics, and Delphi support.

Engineering differentiators

mathlib-fp maintains several documentation and verification practices that are part of its release process:

  • versioned web and offline documentation built from the same reviewed sources as the repository Markdown;
  • beginner recipes and domain learning routes that lead with the double-real, allocating path;
  • a machine-readable capability inventory (capabilities.json) that drives a human-readable status page;
  • a qualification programme with accuracy budgets, independent references, adversarial fixtures, and release-specific evidence reports;
  • runnable documentation examples whose claimed output is checked.

These are described as characteristics of mathlib-fp; this page does not assert that no other compared library does similar things.

Comparison policy

This page is informational, not advertising. It is reviewed at least once per major release and dated. Claims are based on upstream project pages, source repositories, release archives, and license notices; they summarize what each project documents and are not independent compiler tests or performance benchmarks. A missing compatibility claim means it was not verified here, not that the project cannot work on that compiler. Package-specific license differences are called out where the upstream project documents them. No library is declared superior on the basis of raw function counts.

Sources