Found the following significant warnings:
  Rd warning: Previous alias or file overwritten by alias: Conj,onion-method
  Rd warning: Previous alias or file overwritten by alias: Conj,onionmat-method
  Rd warning: Previous alias or file overwritten by alias: il,octonion-method
  Rd warning: Previous alias or file overwritten by alias: jl,octonion-method
  Rd warning: Previous alias or file overwritten by alias: kl,octonion-method
  Rd warning: Previous alias or file overwritten by alias: l,octonion-method
  Rd warning: Previous alias or file overwritten by alias: [,onionmat,ANY,ANY-method
  Rd warning: Previous alias or file overwritten by alias: cos
  Rd warning: Previous alias or file overwritten by alias: sin
  Rd warning: Previous alias or file overwritten by alias: tan
  Rd warning: Previous alias or file overwritten by alias: tanh
  Rd warning: Previous alias or file overwritten by alias: onion_cos
  Rd warning: Previous alias or file overwritten by alias: onion_sin
  Rd warning: Previous alias or file overwritten by alias: onion_tan
  Rd warning: Previous alias or file overwritten by alias: onion_tanh
  Rd warning: Previous alias or file overwritten by alias: cos,onion-method
  Rd warning: Previous alias or file overwritten by alias: sin,onion-method
  Rd warning: Previous alias or file overwritten by alias: tan,onion-method
  Rd warning: Previous alias or file overwritten by alias: tanh,onion-method
  Rd warning: Previous alias or file overwritten by alias: octonion_to_quaternion
  Rd warning: Previous alias or file overwritten by alias: onionmat_power_single
  Rd warning: Previous alias or file overwritten by alias: onionmat_prod_onionmat
  Rd warning: Previous alias or file overwritten by alias: newonionmat
  Rd warning: Previous alias or file overwritten by alias: onionmat
  Rd warning: Previous alias or file overwritten by alias: as.octonionmat
  Rd warning: Previous alias or file overwritten by alias: cprod,ANY,ANY-method
  Rd warning: Previous alias or file overwritten by alias: om_tcprod
  Rd warning: Previous alias or file overwritten by alias: onionmat_arith_onion
  Rd warning: Previous alias or file overwritten by alias: single_arith_onionmat
See ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/onion.Rcheck/00install.out’ for details.