/**
* Given a wavenumber vector generate a cosine function. The
- * wavenumber coefficient is given as a @p{d}-dimensional point @p{k}
- * in Fourier space, and the function is then recovered as @p{f(x) =
- * cos(\sum_i k_i x_i) = Re(\exp(i k.x))}.
+ * wavenumber coefficient is given as a $d$-dimensional point $k$
+ * in Fourier space, and the function is then recovered as $f(x) =
+ * \cos(\sum_i k_i x_i) = Re(\exp(i k.x))$.
*
* The class has its name from the fact that it resembles one
* component of a Fourier cosine decomposition.
/**
* Given a wavenumber vector generate a sine function. The
- * wavenumber coefficient is given as a @p{d}-dimensional point @p{k}
- * in Fourier space, and the function is then recovered as @p{f(x) =
- * sin(\sum_i k_i x_i) = Im(\exp(i k.x))}.
+ * wavenumber coefficient is given as a $d$-dimensional point $k$
+ * in Fourier space, and the function is then recovered as $f(x) =
+ * \sin(\sum_i k_i x_i) = Im(\exp(i k.x))$.
*
* The class has its name from the fact that it resembles one
* component of a Fourier sine decomposition.
/**
* Given a sequence of wavenumber vectors and weights generate a sum
* of sine functions. Each wavenumber coefficient is given as a
- * @p{d}-dimensional point @p{k} in Fourier space, and the entire
+ * $d$-dimensional point $k$ in Fourier space, and the entire
* function is then recovered as
- * @p{f(x) = \sum_j w_j sin(\sum_i k_i x_i) = Im(\sum_j w_j \exp(i k.x))}.
+ * $f(x) = \sum_j w_j sin(\sum_i k_i x_i) = Im(\sum_j w_j \exp(i k.x))$.
*
* @author Wolfgang Bangerth, 2001
*/
/**
* Given a sequence of wavenumber vectors and weights generate a sum
* of cosine functions. Each wavenumber coefficient is given as a
- * @p{d}-dimensional point @p{k} in Fourier space, and the entire
+ * $d$-dimensional point $k$ in Fourier space, and the entire
* function is then recovered as
- * @p{f(x) = \sum_j w_j cos(\sum_i k_i x_i) = Re(\sum_j w_j \exp(i k.x))}.
+ * $f(x) = \sum_j w_j cos(\sum_i k_i x_i) = Re(\sum_j w_j \exp(i k.x))$.
*
* @author Wolfgang Bangerth, 2001
*/
/**
* Cut-off function in L-infinity for an arbitrary ball. This
* function is the characteristic function of a ball around @p{center}
- * with a specified @p{radius}. If vector valued, it can be restricted
+ * with a specified @p{radius}, that is,
+ * \f[
+ * f = \chi(B_r(c)).
+ * \f]
+ * If vector valued, it can be restricted
* to a single component.
*
* @author Guido Kanschat, 2001, 2002