regularized version of
\[\begin{split} \textrm{rect}(x,a,b) = \begin{cases} 1 & x\in[a,b] \\[1em] 0 & \mathrm{otherwise} \end{cases} \end{split}\]
Update
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inline void
setup(real_type h)
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inline void
setup(GenericContainer const &gc)
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inline void
update_h(real_type h)
Evaluate
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inline real_type
operator()(real_type x, real_type a, real_type b) const
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inline real_type
D_1(real_type x, real_type a, real_type b) const
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inline real_type
D_2(real_type x, real_type a, real_type) const
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inline real_type
D_3(real_type x, real_type, real_type b) const
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inline real_type
D_1_1(real_type x, real_type a, real_type b) const
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inline real_type
D_1_2(real_type x, real_type a, real_type) const
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inline real_type
D_1_3(real_type x, real_type, real_type b) const
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inline real_type
D_2_2(real_type x, real_type a, real_type) const
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inline real_type
D_2_3(real_type, real_type, real_type) const
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inline real_type
D_3_3(real_type x, real_type, real_type b) const
Info
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inline string
info() const
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inline void
info(ostream_type &stream) const
