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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2018/01/05 01:36:00 UTC

[jira] [Created] (SYSTEMML-2058) Incorrect results on sparse-dense, sparse-unsafe unary operations

Matthias Boehm created SYSTEMML-2058:
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             Summary: Incorrect results on sparse-dense, sparse-unsafe unary operations
                 Key: SYSTEMML-2058
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2058
             Project: SystemML
          Issue Type: Bug
            Reporter: Matthias Boehm


The generalization of NOT to matrices revealed a hidden issue of incorrect results for sparse-dense unary operations. This happens in case of sparse-unsafe operations that produce a zero for each existing non-zero value because this zeros are rejected by the used append functionality.



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