@article { author = {Grandis, Marco and Par\'e, Robert}, title = {Span and cospan representations of weak double categories}, journal = {Categories and General Algebraic Structures with Applications}, volume = {6}, number = {Speical Issue on the Occasion of Banaschewski's 90th Birthday (I)}, pages = {85-105}, year = {2017}, publisher = {Shahid Beheshti University}, issn = {2345-5853}, eissn = {2345-5861}, doi = {}, abstract = {We prove that many important weak double categories can be `represented' by spans, using the basic higher limit of the theory: the tabulator. Dually, representations by cospans via cotabulators are also frequent.}, keywords = {Double category,tabulator,span}, url = {https://cgasa.sbu.ac.ir/article_39606.html}, eprint = {https://cgasa.sbu.ac.ir/article_39606_b35c476a103000cd063c479026904e91.pdf} }