Reminder: MathML meeting on Thursday

 The meeting details were sent to the W3C members-only "member-math"
mailing list
<https://lists.w3.org/Archives/Member/member-math/2021May/0000.html> for
the group. The regulars for this group should have the meeting details in
their calendars.

Today is the day to tackle what has been a contentious issue for the last
few months (at least): concepts vs literals. There was an agreed on change
to the MathML spec <https://w3c.github.io/mathml/#mixing_intent> on
Wednesday, so maybe this won't take too long (how's that for optimism...).

Agenda
1. Announcements/Updates/Progress reports
2. Is there a consensus or compromise on the concept and literal intent
discussion?
3. Review Core intent names and properties (related to #410, #432)