  We derive lower bounds on the resolvent operator for the linearized steady
Boltzmann equation over weighted L1 Banach spaces in velocity, comparable to
those derived by Pogan & Zumbrun in an analogous weighted L2 Hilbert space
setting. These show in particular that the operator norm of the resolvent
kernel is unbounded in Lp(R) for all $1<p \leq \infty$, resolving an apparent
discrepancy in behavior between the two settings suggested by previous work.
