001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.math3.analysis;
019
020/**
021 * An interface representing a bivariate real function.
022 *
023 * @since 2.1
024 * @version $Id: BivariateFunction.java 1364387 2012-07-22 18:14:11Z tn $
025 */
026public interface BivariateFunction {
027    /**
028     * Compute the value for the function.
029     *
030     * @param x Abscissa for which the function value should be computed.
031     * @param y Ordinate for which the function value should be computed.
032     * @return the value.
033     */
034    double value(double x, double y);
035
036}