The join of two elements of a lattice is their least upper bound. In a lattice of closed set families, it is the closure of their union.
The meet of two elements of a lattice is their greatest lower bound. For set families ordered by inclusion, it is their intersection whenever that intersection lies in the specified lattice.
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The term "join and meet" can be interpreted in a couple of ways depending on the context, as it might refer to different domains such as technology, social interaction, or business. Here are a few interpretations: 1. **Technology/Software**: In the context of online communication tools (like Zoom, Microsoft Teams, or similar platforms), "join and meet" typically refers to the process of joining a scheduled meeting or video conference.