Partial fraction decomposition

Decompose a proper rational function into partial fractions over the given variable.

Validated server-side with Zod. The same schema feeds OpenAPI and the MCP tool list.

{
  "type": "object",
  "properties": {
    "expression": {
      "type": "string",
      "minLength": 1
    },
    "variable": {
      "type": "string",
      "minLength": 1
    }
  },
  "required": [
    "expression",
    "variable"
  ],
  "additionalProperties": false
}

All tools return { ok: true, result } on success and { ok: false, error } on failure. The result object contains:

Request

{
  "expression": "(x+1)/(x^2-1)",
  "variable": "x"
}

Response

{
  "ok": true,
  "result": {
    "result": "(-1+x)^(-1)"
  }
}

curl -X POST https://tools.aieo.se/api/v1/partial_fractions \
  -H 'Content-Type: application/json' \
  -d '{"expression":"(x+1)/(x^2-1)","variable":"x"}'

MCP clients call this tool as tools/call against /api/mcp:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "partial_fractions",
    "arguments": {
      "expression": "(x+1)/(x^2-1)",
      "variable": "x"
    }
  }
}

• Expression is not a rational function.
  Returns the input unchanged or throws.
• Numerator degree ≥ denominator degree.
  Output may include a polynomial part; combine with `polynomial_division` first if needed.
• A required field is missing or has the wrong type.
  Zod validation error, e.g. `Required` or `Expected string, received number`.
• Nerdamer cannot parse the expression (unbalanced parens, unknown function, stray characters).
  `Unexpected token …` or `… is not a valid expression`.