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https://reference.wolfram.com/language/ref/Join.html Join: Concatenate lists or other expressions—Wolfram Documentation Join[list1, list2, ...] concatenates lists or other expressions that share the same head. Join[list1, list2, ..., n] joins the objects at level n in each of... join concatenate lists documentation https://pandas.pydata.org/pandas-docs/version/1.5.3/user_guide/merging.html Merge, join, concatenate and compare — pandas 1.5.3 documentation merge join concatenate pandas 1 5 3 documentation compare https://pandas.pydata.org/pandas-docs/stable/user_guide/merging.html Merge, join, concatenate and compare — pandas 3.0.2 documentation merge join concatenate pandas 3 0 2 documentation compare https://pandas.pydata.org/docs/user_guide/merging.html Merge, join, concatenate and compare — pandas 3.0.2 documentation merge join concatenate pandas 3 0 2 documentation compare