| Name | Description | Type | Package | Framework |
| ExponentialDecayFunction | Exponential decay function: a e-x / b, where x is the (integer) independent variable. | Class | org.apache.commons.math3.ml.neuralnet.sofm.util | Apache Commons |
| QuasiSigmoidDecayFunction | Decay function whose shape is similar to a sigmoid. | Class | org.apache.commons.math3.ml.neuralnet.sofm.util | Apache Commons |