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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="math_toolkit.using_udt.use_ntl"></a><a class="link" href="use_ntl.html" title="Using With NTL - a High-Precision Floating-Point Library"> Using With NTL - a High-Precision |
| Floating-Point Library</a> |
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| <p> |
| The special functions and tools in this library can be used with <a href="http://shoup.net/ntl/doc/RR.txt" target="_top">NTL::RR |
| (an arbitrary precision number type)</a>, via the bindings in <a href="../../../../../../../boost/math/bindings/rr.hpp" target="_top">boost/math/bindings/rr.hpp</a>. |
| <a href="http://shoup.net/ntl/" target="_top">See also NTL: A Library for doing Number |
| Theory by Victor Shoup</a> |
| </p> |
| <p> |
| Unfortunately <code class="computeroutput"><span class="identifier">NTL</span><span class="special">::</span><span class="identifier">RR</span></code> doesn't quite satisfy our conceptual |
| requirements, so there is a very thin wrapper class <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">ntl</span><span class="special">::</span><span class="identifier">RR</span></code> defined in <a href="../../../../../../../boost/math/bindings/rr.hpp" target="_top">boost/math/bindings/rr.hpp</a> |
| that you should use in place of <code class="computeroutput"><span class="identifier">NTL</span><span class="special">::</span><span class="identifier">RR</span></code>. The |
| class is intended to be a drop-in replacement for the "real" NTL::RR |
| that adds some syntactic sugar to keep this library happy, plus some of the |
| standard library functions not implemented in NTL. |
| </p> |
| <p> |
| For those functions that are based upon the <a class="link" href="../backgrounders/lanczos.html" title="The Lanczos Approximation">Lanczos |
| approximation</a>, the bindings defines a series of approximations with |
| up to 61 terms and accuracy up to approximately 3e-113. This therefore sets |
| the upper limit for accuracy to the majority of functions defined this library |
| when used with <code class="computeroutput"><span class="identifier">NTL</span><span class="special">::</span><span class="identifier">RR</span></code>. |
| </p> |
| <p> |
| There is a concept checking test program for NTL support <a href="../../../../../../../libs/math/test/ntl_concept_check.cpp" target="_top">here</a>. |
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| Hubert Holin, Xiaogang Zhang, Bruno Lalande, Johan Råde, Gautam Sewani and |
| Thijs van den Berg<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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