text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2018 The Stdlib Authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *    http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
  
  'use strict';
  
  // MODULES //
  
  var isnan = require( '@stdlib/math-base-assert-is-nan' );
  var pow = require( '@stdlib/math-base-special-pow' );
  
  
  // MAIN //
  
  /**
  * Returns the median of a Kumaraswamy's double bounded distribution.
  *
  * @param {PositiveNumber} a - first shape parameter
  * @param {PositiveNumber} b - second shape parameter
  * @returns {PositiveNumber} median
  *
  * @example
  * var v = median( 0.5, 1.0 );
  * // returns 0.25
  *
  * @example
  * var v = median( 4.0, 12.0 );
  * // returns ~0.487
  *
  * @example
  * var v = median( 12.0, 2.0 );
  * // returns ~0.903
  *
  * @example
  * var v = median( 1.0, -0.1 );
  * // returns NaN
  *
  * @example
  * var v = median( -0.1, 1.0 );
  * // returns NaN
  *
  * @example
  * var v = median( 2.0, NaN );
  * // returns NaN
  *
  * @example
  * var v = median( NaN, 2.0 );
  * // returns NaN
  */
  function median( a, b ) {
  	if (
  		isnan( a ) ||
  		a <= 0.0 ||
  		isnan( b ) ||
  		b <= 0.0
  	) {
  		return NaN;
  	}
  	return pow( 1.0 - pow( 2.0, -1.0/b ), 1.0/a );
  }
  
  
  // EXPORTS //
  
  module.exports = median;
  