import { ICloneable, IEquatable } from "@chemistry/common";
import { Vec3 } from "./vec3";
export declare class Matrix3x3 implements ICloneable<Matrix3x3>, IEquatable<Matrix3x3> {
    static equals(m1: Matrix3x3, m2: Matrix3x3): boolean;
    static inverse(matrix: Matrix3x3): Matrix3x3;
    protected elements: number[];
    constructor(elements?: number[]);
    /**
     * Set value to specified element of the matrix
     */
    set(i: number, j: number, val: number): void;
    /**
     * return specified element of the matrix
     */
    get(i: number, j: number): number;
    scale(mult: number): Matrix3x3;
    project(mult: Vec3): Vec3;
    /**
     * Returns matrix multiplication result to scalar, vector or another matrix
     */
    multiply(mult: Matrix3x3): Matrix3x3;
    /**
     * Returns matrix determinant
     */
    determinant(): number;
    /**
     * Clone the matrix
     */
    clone(): Matrix3x3;
    /**
     * Compare 2 matrixes
     */
    equals(matrix: Matrix3x3): boolean;
    /**
     * Returns string representation of the matrix
     */
    toString(): string;
}