Digital homotopy relations and digital homology theories

@article{Staecker2021DigitalHR,
  title={Digital homotopy relations and digital homology theories},
  author={P. Christopher Staecker},
  journal={ArXiv},
  year={2021},
  volume={abs/2106.01171}
}
In this paper we prove results relating to two homotopy relations and four homology theories developed in the topology of digital images.We introduce a new type of homotopy relation for digitally continuous functions which we call ``strong homotopy.'' Both digital homotopy and strong homotopy are natural digitizations of classical topological homotopy: the difference between them is analogous to the difference between digital 4-adjacency and 8-adjacency in the plane.We also consider four… 

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