  We establish the local H\"older continuity of possibly sign-changing
solutions to a class of doubly nonlinear parabolic equations whose prototype is
\[ \partial_t\big(|u|^{q-1}u\big)-\Delta_p u=0,\quad 1<p<2,\quad 0<p-1<q. \]
The proof exploits the space expansion of positivity for the singular,
parabolic $p$-Laplacian and employs the method of intrinsic scaling by
carefully balancing the double singularity.
