import type { MatOpMM, MultiMatOpMM } from "./api.js";
/**
 * Componentwise matrix subtraction. If `out` is not given, writes
 * result in `a`. Both input matrices MUST be of same size.
 *
 * out = a - b
 *
 * @param out -
 * @param a -
 * @param b -
 */
export declare const sub: MultiMatOpMM;
export declare const sub22: MatOpMM;
export declare const sub23: MatOpMM, sub33: MatOpMM, sub44: MatOpMM;
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