diff --git a/courses/mathdata.md b/courses/mathdata.md
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--- a/courses/mathdata.md
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@@ -24,6 +24,29 @@ Announcements will be posted on the [KWARC mathematical data mailing list](http:
 
 ### Upcoming seminars:
 
+##### The Knowledge of Mathematics
+
+- *Time*: Friday, July 3, 2020 from 14:00 to 15:30 (Central European Summer Time, UTC+2)
+- *Location*: online at Zoom ID: 960 8031 7108
+- *Speaker*: Patrick Ion (Mathematical Reviews (retd.), University of Michigan, Ann Arbor, MI)
+
+**Abstract.** Mathematics is a body of knowledge, and it has many representations.  A
+library is traditionally a repository of materials that provide access to knowledge.
+The idea of a universal library, or of one just for mathematics, has long been an
+obvious one.  In the modern day (last century or so) it has come up again from
+time to time with each new technological change and notion of representing
+mathematics.  Working forward from a resolution of the International Mathematical
+Union in 2006 efforts have been under taken to realize a Global Digital Mathematics Library. As part of this an International Mathematical Knowledge Trust has been
+founded. I will speak of grand plans, small successes and enormous challenges
+that remain in describing some of recent GDML/IMKT activity. This will be from
+the point of view I've acquired as a result of watching the field from
+Math Reviews (MR) for 30 years or so, being involved with TeX and databases
+at MR and with creation of MathML, as well as trying to understand a little bit
+of specific subjects (quantum field theory and statistical mechanics, hyperfunctions,
+non-commutative geometry, quantum stochastic processes---i.e., anti-Gauss: "multa sed immatura")
+
+### Past seminars:
+
 ##### The Role of Data in Discrete Mathematics
 
 - *Time*: Friday, June 19, 2020 from 14:00 to 15:30 (Central European Summer Time, UTC+2)
@@ -42,9 +65,6 @@ and I will discuss why I think better tools are needed and why they wouldn't eve
 Finally, I will talk briefly about some work in progress with Katja Berčič and Jukka Kohonen 
 toward developing some new data sets and a Sage package to help my research community.
 
-
-### Past seminars:
-
 ##### Big Math and the One-Brain Barrier -- The Tetrapod Model of Mathematical Knowledge
 
 - *Time*: Friday, June 5, 2020 from 14:00 to 15:30 (Central European Summer Time, UTC+2)