Might be worth to point to Terry Tao‘s post on MathOverflow about notation, as it seems to be missing in this collection.<p><a href="https://mathoverflow.net/questions/366070/what-are-the-benefits-of-writing-vector-inner-products-as-langle-u-v-rangle/366118#366118" rel="nofollow">https://mathoverflow.net/questions/366070/what-are-the-benef...</a><p>It was discussed here:<p><a href="https://news.ycombinator.com/item?id=23911903" rel="nofollow">https://news.ycombinator.com/item?id=23911903</a>