This paper introduces a visual framework in the environment of a computer algebra system (CAS) for displaying interregional trading patterns in multi-region, multi-activity economies. Interregional input-output tables illustrate spatial and economic interdependencies within interregional trade and are considered a key component in input-output modeling. The study and analysis of the interregional trade flows in interregional economic activities often reveal interregional and inter-activity linkages, referred to as «feedback loops» and/or spatial production cycles in interregional level.
