J. Hopper, "Twining character formula for reductive groups," J. Ramanujan Mathematical Society, 38 (2023), 237–263, arXiv:2204.03600.
J. Hopper and P. Pollack, "Digitally delicate primes," J. Number Theory 168 (2016), 247-256, arXiv:1510.03401.
J. Hopper, The twining character formula for split groups and a cellular paving for quasi-split groups, University of Maryland (2024).
J. Hopper, "Weyl algebras and D-modules," (2018). Part III Master's Essay for the University of Cambridge, available on request.
J. Hopper, "On covering systems of integers," (2017). Undergraduate Honors Thesis for the University of Georgia, arXiv:1705.04372.