Group Sunspot Numbers: A New Reconstruction of Sunspot Activity Variations from Historical Sunspot Records Using Algorithms from Machine Learning

Indeed we think that this paper is very important on various fronts, including
even the rather clear and revisionist attempts by several activists during the last
10 years or more to try to modify the Group Sunspot Number (GSNs) record with
rather flawed reasonings and evidence as documented in this detailed paper.


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