Classes | |
struct | NumberTraits |
struct | NumberTraits< std::complex< number > > |
Functions | |
bool | is_finite (const double x) |
bool | is_finite (const std::complex< double > x) |
bool | is_finite (const std::complex< float > x) |
bool | is_finite (const std::complex< long double > x) |
Variables | |
static const unsigned int | invalid_unsigned_int = static_cast<unsigned int> (-1) |
static const double | E = 2.7182818284590452354 |
static const double | LOG2E = 1.4426950408889634074 |
static const double | LOG10E = 0.43429448190325182765 |
static const double | LN2 = 0.69314718055994530942 |
static const double | LN10 = 2.30258509299404568402 |
static const double | PI = 3.14159265358979323846 |
static const double | PI_2 = 1.57079632679489661923 |
static const double | PI_4 = 0.78539816339744830962 |
static const double | SQRT2 = 1.41421356237309504880 |
static const double | SQRT1_2 = 0.70710678118654752440 |
math.h
is not always guaranteed, we put them here. Since this file is included by base/config.h
, they are available to the whole library.
The constants defined here are a subset of the M_XXX
constants sometimes declared in the system include file math.h
, but without the prefix M_
.
In addition to that, we declare invalid_unsigned_int
to be the largest unsigned integer representable; this value is widely used in the library as a marker for an invalid index, an invalid size of an array, and similar purposes.
Return true
if the given value is a finite floating point number, i.e. is neither plus or minus infinity nor NaN (not a number).
Note that the argument type of this function is double
. In other words, if you give a very large number of type long double
, this function may return false
even if the number is finite with respect to type long double
.
Referenced by Vector< Number >::add(), SparseMatrixEZ< number >::add(), BlockSparseMatrixEZ< Number >::add(), Vector< Number >::operator*=(), Vector< Number >::operator/=(), Vector< Number >::operator=(), Vector< Number >::sadd(), Vector< Number >::scale(), SparseMatrixEZ< number >::set(), and BlockSparseMatrixEZ< Number >::set().
Return true
if real and imaginary parts of the given complex number are finite.
bool numbers::is_finite | ( | const std::complex< float > | x | ) |
Return true
if real and imaginary parts of the given complex number are finite.
Return true
if real and imaginary parts of the given complex number are finite.
Again may not work correctly if real or imaginary parts are very large numbers that are infinite in terms of double
, but finite with respect to long double
.
const unsigned int numbers::invalid_unsigned_int = static_cast<unsigned int> (-1) [static] |
Representation of the largest number that can be put into an unsigned integer. This value is widely used throughout the library as a marker for an invalid unsigned integer value, such as an invalid array index, an invalid array size, and the like.
Referenced by FiniteElement< dim, spacedim >::block_to_base_index(), internal::hp::DoFObjects< dim >::fe_index_is_active(), internal::hp::DoFObjects< dim >::get_dof_index(), internal::hp::DoFObjects< dim >::n_active_fe_indices(), internal::hp::DoFObjects< dim >::nth_active_fe_index(), MGTransferSelect< number >::select(), and internal::hp::DoFObjects< dim >::set_dof_index().
const double numbers::E = 2.7182818284590452354 [static] |
e
const double numbers::LOG2E = 1.4426950408889634074 [static] |
log_2 e
const double numbers::LOG10E = 0.43429448190325182765 [static] |
log_10 e
const double numbers::LN2 = 0.69314718055994530942 [static] |
log_e 2
const double numbers::LN10 = 2.30258509299404568402 [static] |
log_e 10
const double numbers::PI = 3.14159265358979323846 [static] |
pi
const double numbers::PI_2 = 1.57079632679489661923 [static] |
pi/2
const double numbers::PI_4 = 0.78539816339744830962 [static] |
pi/4
const double numbers::SQRT2 = 1.41421356237309504880 [static] |
sqrt(2)
const double numbers::SQRT1_2 = 0.70710678118654752440 [static] |
1/sqrt(2)