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Looking into the nalgebra source code, we find that the first expression is implemented using generics
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InfluxDB
Purpose built for real-time analytics at any scale. InfluxDB Platform is powered by columnar analytics, optimized for cost-efficient storage, and built with open data standards.
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Finally, I found the answer in the RFC Book (RFC stands for Request For Comments). RFC 2451 from 2018-05-30 that starts with the following lines:
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