@inproceedings{Zheng, author = {Zheng, Xizhong}, title = {A Computability Theory of Real Numbers}, series = {CCA 2008, August 21 - 24, 2008, Hagen, Germany}, booktitle = {CCA 2008, August 21 - 24, 2008, Hagen, Germany}, editor = {Brattka, Vasco}, publisher = {Hagen}, address = {Fernuniv.}, language = {en} } @inproceedings{RettingerZheng, author = {Rettinger, Robert and Zheng, Xizhong}, title = {Points on Computable Curves of Computable Lengths}, language = {en} } @inproceedings{RettingerZheng, author = {Rettinger, Robert and Zheng, Xizhong}, title = {On the Computability of the Rectifiable Simple Curves}, language = {en} } @article{Zheng, author = {Zheng, Xizhong}, title = {Classification of Computably Approximable Real Numbers}, language = {en} } @article{Zheng, author = {Zheng, Xizhong}, title = {A Hierarchy of Computably Enumerable Reals}, language = {en} }