@article{12406,
  abstract     = {Let X be a sufficiently large positive integer. We prove that one may choose a subset S of primes with cardinality O(logX) such that a positive proportion of integers less than X can be represented by x2+py2 for at least one p∈S.},
  author       = {Diao, Yijie},
  issn         = {1730-6264},
  journal      = {Acta Arithmetica},
  keywords     = {Algebra, Number Theory},
  pages        = {1--17},
  publisher    = {Instytut Matematyczny},
  title        = {{Density of the union of positive diagonal binary quadratic forms}},
  doi          = {10.4064/aa210830-24-11},
  volume       = {207},
  year         = {2023},
}