Necessary and sufficient conditions for the existence of the group inverse of the block matrix in Minkowski Space are studied, where are both square and . The representation of this group inverse and some related additive results are also given.
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![\"\"](\"Edit_39337c9c-bdbd-4cc0-a419-133a89460ff1.bmp\")
in Minkowski Space are studied, where ![\"\"](\"Edit_97121fd1-15cc-4494-9f30-5d4e9b4e357a.bmp\")
are both square and ![\"\"](\"Edit_2c3c074c-cee8-4796-a713-c36baaadbbcb.bmp\")
. The representation of this group inverse and some related additive results are also given.
