import type { MultiVecOpM } from "./api.js";
/**
 * Extracts matrix diagonal into `out`.
 *
 * @param out -
 * @param mat -
 */
export declare const diag: MultiVecOpM;
export declare const diag22: import("./api.js").VecOpM;
export declare const diag23: import("./api.js").VecOpM;
export declare const diag33: import("./api.js").VecOpM;
export declare const diag44: import("./api.js").VecOpM;
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