By means of a theory or theorem; by means of deduction.
Origin
Mid 17th century; earliest use found in Thomas Urquhart (1611–1660), author and translator. Either from theorematic + -ally, or from theorematical + -ly.
Definition of theorematically in US English:
theorematically
adverbˌθɪərəˈmatɪkli
rare
By means of a theory or theorem; by means of deduction.
Origin
Mid 17th century; earliest use found in Thomas Urquhart (1611–1660), author and translator. Either from theorematic + -ally, or from theorematical + -ly.