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.
  *
  *
  * ## Notice
  *
  * The original C++ code and copyright notice are from the [Boost library]{@link http://www.boost.org/doc/libs/1_37_0/boost/math/special_functions/gamma.hpp}. The implementation has been modified for JavaScript.
  *
  * ```text
  * (C) Copyright John Maddock 2006.
  * (C) Copyright Paul A. Bristow 2007.
  *
  * Use, modification and distribution are subject to the
  * Boost Software License, Version 1.0. (See accompanying file
  * LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
  * ```
  */
  
  'use strict';
  
  // MODULES //
  
  var evalpoly = require( './../../../../base/tools/evalpoly' );
  var erfc = require( './../../../../base/special/erfc' );
  var sqrt = require( './../../../../base/special/sqrt' );
  var exp = require( './../../../../base/special/exp' );
  var ln = require( './../../../../base/special/ln' );
  var TWO_PI = require( '@stdlib/constants/float64/two-pi' );
  var polyvalC0 = require( './polyval_c0.js' );
  var polyvalC1 = require( './polyval_c1.js' );
  var polyvalC2 = require( './polyval_c2.js' );
  var polyvalC3 = require( './polyval_c3.js' );
  var polyvalC4 = require( './polyval_c4.js' );
  var polyvalC5 = require( './polyval_c5.js' );
  var polyvalC6 = require( './polyval_c6.js' );
  var polyvalC7 = require( './polyval_c7.js' );
  var polyvalC8 = require( './polyval_c8.js' );
  
  
  // VARIABLES //
  
  // Pre-allocate workspace array:
  var workspace = [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ]; // WARNING: not thread safe
  
  
  // MAIN //
  
  /**
  * Asymptotic expansions of the incomplete gamma functions when `a` is large and `x ~ a` (IEEE double precision or 10^-17).
  *
  * @private
  * @param {number} a - function parameter
  * @param {number} x - function parameter
  * @returns {number} value of asymptotic expansion
  */
  function igammaTemmeLarge( a, x ) {
  	var result;
  	var sigma;
  	var phi;
  	var y;
  	var z;
  
  	sigma = ( x-a ) / a;
  	phi = -ln( 1.0 + sigma ) + sigma;
  	y = a * phi;
  	z = sqrt( 2.0 * phi );
  	if ( x < a ) {
  		z = -z;
  	}
  	workspace[ 0 ] = polyvalC0( z );
  	workspace[ 1 ] = polyvalC1( z );
  	workspace[ 2 ] = polyvalC2( z );
  	workspace[ 3 ] = polyvalC3( z );
  	workspace[ 4 ] = polyvalC4( z );
  	workspace[ 5 ] = polyvalC5( z );
  	workspace[ 6 ] = polyvalC6( z );
  	workspace[ 7 ] = polyvalC7( z );
  	workspace[ 8 ] = polyvalC8( z );
  	workspace[ 9 ] = -0.00059676129019274625;
  	result = evalpoly( workspace, 1.0/a );
  	result *= exp( -y ) / sqrt( TWO_PI * a );
  	if ( x < a ) {
  		result = -result;
  	}
  	result += erfc( sqrt(y) ) / 2.0;
  	return result;
  }
  
  
  // EXPORTS //
  
  module.exports = igammaTemmeLarge;
  