export type ActivationFn = (x: number, derivative: number) => number;
export declare const allActivationFnNames: readonly ["LOGISTIC", "TANH", "IDENTITY", "STEP", "RELU", "SOFTSIGN", "SINUSOID", "GAUSSIAN", "BENT_IDENTITY", "BIPOLAR", "BIPOLAR_SIGMOID", "HARD_TANH", "ABSOLUTE", "INVERSE", "SELU"];
export type ActivationFnName = typeof allActivationFnNames[number];
export declare const LOGISTIC: ActivationFn;
export declare const TANH: ActivationFn;
export declare const IDENTITY: ActivationFn;
export declare const STEP: ActivationFn;
export declare const RELU: ActivationFn;
export declare const SOFTSIGN: ActivationFn;
export declare const SINUSOID: ActivationFn;
export declare const GAUSSIAN: ActivationFn;
export declare const BENT_IDENTITY: ActivationFn;
export declare const BIPOLAR: ActivationFn;
export declare const BIPOLAR_SIGMOID: ActivationFn;
export declare const HARD_TANH: ActivationFn;
export declare const ABSOLUTE: ActivationFn;
export declare const INVERSE: ActivationFn;
export declare const SELU: ActivationFn;
export declare const getActivationFn: (activationFnName: ActivationFn) => ActivationFn;