  ADER (Arbitrary high order by DERivatives) and Lax-Wendroff (LW) schemes are
two high order single stage methods for solving time dependent partial
differential equations. ADER is based on solving a locally implicit equation to
obtain a space-time predictor solution while LW is based on an explicit
Taylor's expansion in time. We cast the corrector step of ADER Discontinuous
Galerkin (DG) scheme into an equivalent quadrature free Flux Reconstruction
(FR) framework and then show that the obtained ADER-FR scheme is equivalent to
the LWFR scheme with D2 dissipation numerical flux for linear problems. This
also implies that the two schemes have the same Fourier stability limit for
time step size. The equivalence is verified by numerical experiments.
