Or Meir. The Direct Sum of Universal Relations. Electronic Colloquium on Computational Complexity (ECCC), 24:128, 2017. [doi]
@article{Meir17, title = {The Direct Sum of Universal Relations}, author = {Or Meir}, year = {2017}, url = {https://eccc.weizmann.ac.il/report/2017/128}, researchr = {https://researchr.org/publication/Meir17}, cites = {0}, citedby = {0}, journal = {Electronic Colloquium on Computational Complexity (ECCC)}, volume = {24}, pages = {128}, }