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Yonderdrake documentation
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Getting started

  • Installation
  • Quickstart

Nonlocal time operators

  • Fractional time derivatives
  • Time-fractional PDEs
  • Exponential memory and Caputo-Fabrizio
  • Caputo-Wismer imaging
  • Mathematics and Implementation
  • How the memory is advanced

Nonlocal space operators

  • Fractional space
  • Spectral fractional Laplacian
  • Riesz/restricted fractional Laplacian
  • Periodic Fourier fractional Laplacian

Applications and workflow

  • Refinement workflow
  • Solvers, field splits, and MPI
  • Checkpoint and restart
  • Classical time stepping with Irksome
  • Gallery
    • Head-model data and parallel runs

Reference

  • Conventions and normalizations
  • Accuracy and performance
  • API and supported scope
  • Detailed API reference
  • Performance and MPI
  • References

Development

  • Contributing
  • Supported platforms and dependencies
  • Logo
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LogoΒΆ

The Yonderdrake logo, a dragon drawn in a viridis-like colour scheme

The logo nods to the long memory of time-fractional operators: a fractional derivative still feels the entire history that preceded it.

The dragon is inspired by the Lindwurmbrunnen in Klagenfurt, Austria, drawn in a viridis-like colour scheme to match the default palette used throughout the gallery.

The logo and the favicon are committed at docs/source/_static/:

File

Use

yonderdrake-logo.png

Sidebar logo (html_logo) and the README header

yonderdrake-favicon.png

Browser tab icon (html_favicon)

Both are released under the same MIT License as the rest of the project.

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Supported platforms and dependencies
Copyright © 2026, Timon S. Gutleb and contributors
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