Notation friction
You know the math. Typing \frac{\partial}{\partial x}, aligning environments, and balancing braces is what slows the page down.
RailFunction turns shorthand math notes — typed, pasted, or pseudo-LaTeX — into clean, compileable LaTeX and a publication-ready PDF. Built for the way working mathematicians actually write.
Every grad student loses hours a week to formatting. The bottleneck isn't thinking — it's syntax.
You know the math. Typing \frac{\partial}{\partial x}, aligning environments, and balancing braces is what slows the page down.
Whiteboard shorthand, voice memos, scratch PDFs — none of it lands cleanly in a paper draft without manual re-typing.
Advisors and collaborators want a rendered PDF, not a snippet. Round-tripping through Overleaf for one section is overhead.
Paste a block of notes. Get a clean LaTeX source you can drop into a paper, plus a downloadable PDF.
Thm (Cauchy-Schwarz). for u,v in inner prod space V: |<u,v>|^2 <= <u,u> * <v,v> equality iff u,v linearly dep. proof sketch: let t in R. consider <u + tv, u + tv> >= 0 expand: <u,u> + 2t<u,v> + t^2<v,v> >= 0 quadratic in t nonneg => discriminant <= 0 => 4<u,v>^2 - 4<u,u><v,v> <= 0 ∎
Proof.
For t ∈ ℝ, ⟨u + tv, u + tv⟩ ≥ 0. Expanding:No tiers, no add-ons, no free-trial dark patterns.
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