Using techniques similar to Gryzlov's, we prove that every 2κ-total, T1-space of pseudocharacter ⩽ κ is compact and hence of cardinality ⩽ 2κ. Some related results and examples are given.

InfluxDB 3.0 delivers unlimited cardinality and high throughput with 10x the ingestion performance for continuous ingest, transformation, and analysis of billions of time series data points per second ...

We focus in this paper on the cardinality constrained mean-variance portfolio selection problem. Instead of tailoring such a difficult problem into the general solution framework of mixed-integer ...