Documentation

Everything you need to compose, compute, and reuse formulas in My Equation Book.

Getting started

1. Create your first page. Click Add Page in the toolbar and give it a name — a class name, a project, a lab number, whatever suits your workflow.

2. Add an equation. Below the toolbar, click Add Equation. You get three inputs:

• Name — how the left-hand side displays, e.g. V_out or sigma_f.
• Expression — the formula, e.g. V / R.
• Parameters — comma-separated variable names your expression uses, e.g. V, R.

3. Enter values and execute. A row of numeric inputs appears below for each parameter. Fill them in with values (and units, if you like), then click Execute.

4. Save to your account. Every edit lights up the Save button. Click it to persist your book. Your browser will warn you if you try to leave with unsaved changes.

Notation basics

Type plain identifiers; the app renders them as textbook math.

Greek letters

Type the letter's name; the preview shows the symbol.

Accents & decorations

Wrap a symbol in one of these to add a diacritic. All are display-only when evaluated.

Calculus notation

These are notation-only — they don't actually differentiate or integrate. They just typeset the way you'd write it.

Units

Parameter values accept SI unit expressions. Enter 12 V, 4 ohm, 5 GHz, 1 kg/m^3. Units flow through the whole computation.

You can also convert inline: (2 A) to mA returns 2000 mA. Common prefixes work: k, M, G, T and m, u, n, p.

Referencing equations

Give an equation a name and use it as a variable in a later equation on the same page.

• Bare name like V_out → referenced as V_out.
• Wrapped like hat(V_in) → referenced as V_in.
• Custom operator: V_out, \approx shows an ≈ instead of =.
• Full three-part name: displayName, operator, refName. Handy for multi-argument notation like pderiv(f, x), =, dfdx, which displays as ∂f/∂x but is referenced elsewhere as dfdx.

When you reference another equation inside an expression, the preview substitutes the referenced equation's LaTeX — so a formula referencing dfdx renders with the full ∂f/∂x baked in. Numerically, it uses that equation's last executed value.

Toolbar & buttons

Toolbar (top of the page)

• Add Page / Duplicate Page / Rename Page / Delete Page — manage pages.
• Playground — a scratch pad to test-render any LaTeX you paste in.
• Theme toggle (☀ / ☾) — dark or light.
• Help — the same notation cheat sheet, always one click away.
• Save — persist the current book. Lights up when you have unsaved changes.
• Log out — return to the marketing page.

Per-equation row

• Execute — run just this equation.
• Edit — larger modal editor with a big preview.
• ▲ / ▼ — reorder within the page.
• Duplicate — insert a copy directly below.
• Copy — copy the whole equation to a clipboard for pasting on another page (with dependencies).
• Delete — remove the equation.
• LaTeX — opens a viewer with the LaTeX source and a copy-to-clipboard button.
• LaTeX = — same viewer, but with numeric values substituted in for a worked-out form.

Your account

Every book is scoped to your account and stored on the server. You can log in from any device and pick up where you left off.

The Save button warns you if the server has a newer version of your book than what you're editing (another tab, another device). You can reload and rebuild, or keep editing and try again.

Each save also snapshots the previous state — the 20 most recent versions are kept. History and restore controls are on the roadmap.