For nonlinear time-varying circuits with general dependent sources, we give a structural characterization of the tractability index of DAEs arising from the hybrid analysis. This enables us to ...

Wyatt Thompson, Scott Gerlt, J. Elliott Campbell, Lara M. Kueppers, Yaqiong Lu, Mark A. Snyder, A Cost of Tractability? Estimating Climate Change Impacts Using a Single Crop Market Understates Impacts ...

Tractability is also pretty obvious: How easy is it to make progress on the problem? Some problems are obviously big and important, but there are no good proposals to actually address them.