Eqiora language

An .eqi file describes a mathematical model: its quantities, equations, initial and boundary data, and measurements. Python chooses how to compute with that model. Use this reference to look up syntax; start with Mathematical modeling for the reasoning behind it.

Write or look up	Reference
model, parameter, variable, state, domain, observable	Declarations
Dimensions, SI units, scaled literals, vectors	Quantities and units
relation, derivative, initial, law, form, clocks	Equations and state
component, instance, connect, import, material properties	Composition
Electrical, solid, fluid, and sampled-control components	Standard library

Compile a first model

Save this complete model as current.eqi:

eqi

model Current() {
  parameter voltage: V = 12;
  parameter resistance: Ohm = 4;
  variable current: A;
  relation ohm { voltage = resistance * current; }
  observable measured_current: A = current;
}

After installation, compile it:

python

import eqiora

model = eqiora.compile(path="current.eqi")
measurement = model.observable("measured_current")

The equation determines a current of 3 A. Compilation checks its types and mathematical structure; execution selects a solver and produces a Result from which you can read the measurement.

For a time-dependent example, continue with ordinary differential equations. For exact API signatures, use the Python reference.

Language implementation · Compiler