@article{202105.0499, doi = {10.20944/preprints202105.0499.v1}, url = {https://doi.org/10.20944/preprints202105.0499.v1}, year = 2021, month = {May}, publisher = {Preprints}, author = {Li Jiang}, title = {3x + 1 Problem: Iterative Operations Neither Cause Loops nor Diverge to Infinity}, journal = {Preprints} }