Satellite Image Time Series (SITS) record the continuous temporal behavior of land cover types and thus provide a new perspective for finer-grained classification compared with usual spectral spatial information contained in static image. In addition, SITS data is becoming more accessible recent years due to newly launched satellites accumulated historical data. However, lack labeled training s...

The aim of this article is to draw attention towards various natural but unanswered questions related the lower central series unit group an integral ring.