Articles Title Id Created Updated
1Plug-flow criterion for a column in a low-viscosity annulusplug-flow-criterion-for-a-column-in-a-low-viscosity-annulus2026-10-062026-10-06
1Annular return flow around a slumping columnannular-return-flow-around-a-slumping-column2026-10-062026-10-06
1Short exact sequence in an abelian categoryshort-exact-sequence-in-an-abelian-category2026-10-062026-10-06
1Euler class of a complex vector bundleeuler-class-of-a-complex-vector-bundle2026-10-062026-10-06
1Convex potential for the Erlang fixed pointconvex-potential-for-the-erlang-fixed-point2026-10-062026-10-06
1Ergodic componentergodic-component2026-10-062026-10-06
1Ergodic components of a rational circle rotationergodic-components-of-a-rational-circle-rotation2026-10-062026-10-06
1Cubic propagation along a triangular stripcubic-propagation-along-a-triangular-strip2026-10-062026-10-06
1Maximum effective temperature of a zero-torque diskmaximum-effective-temperature-of-a-zero-torque-disk2026-10-062026-10-06
1Conservative mass-transfer critical mass ratioconservative-mass-transfer-critical-mass-ratio2026-10-062026-10-06
1Euler defect identity for a projective line arrangementeuler-defect-identity-for-a-projective-line-arrangement2026-10-062026-10-06
1Good edge of a dual line arrangementgood-edge-of-a-dual-line-arrangement2026-10-062026-10-06
1Adiabatic parcel gradient in a hydrostatic environmentadiabatic-parcel-gradient-in-a-hydrostatic-environment2026-10-062026-10-06
1Drift estimatordrift-estimator2026-10-062026-10-06
1Period invariant for constant-fraction donor-wind mass lossperiod-invariant-for-constant-fraction-donor-wind-mass-loss2026-10-062026-10-06
1Donor-wind Roche-lobe responsedonor-wind-roche-lobe-response2026-10-062026-10-06
1Projection residual for discrete total variationprojection-residual-for-discrete-total-variation2026-10-062026-10-06
1Time-dependent test functions for a diffusion martingale problemtime-dependent-test-functions-for-a-diffusion-martingale-problem2026-10-062026-10-06
1Planet-induced debris-disk warpplanet-induced-debris-disk-warp2026-10-062026-10-06
1Parametrized geodesics determine the symmetric part of an affine connectionparametrized-geodesics-determine-the-symmetric-part-of-an-affine-connection2026-10-062026-10-06

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Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact