1 files changed, 30 insertions, 20 deletions

diff --git a/src/talks/talks.md b/src/talks/talks.md
index 5cfc928..3e663d9 100644
--- a/src/talks/talks.md
+++ b/src/talks/talks.md
@@ -1,31 +1,24 @@
 # Talks
 
-## Software
+## 2025
 
 * *WebAssembly and Emscripten*. 
   ALTEN Advanced Software Evening, December 2025.
   [Slides: [html, 1.7Mb](./wasm);
    Examples: [zip, 83Kb](./wasm/examples.zip)]
 
-* *L'importanza del software libero nella ricerca (ITA)*.
-  Linux day in Feltre, October 2019.
-  [Slides: [pdf, 804Kb](linuxday2019.pdf);
-   [Video](https://www.youtube.com/watch?v=FB0YIYNp3rw)]
-
-* *Linux from scratch (ITA)*
-  Linux day in Sedico, October 2012.
-  [Video](https://www.youtube.com/watch?v=h7xW7iq-ApA).
-
-## Math
-
 * *Elliptic Curves and the ECM algorithm*.
   ALTEN Scientific Software Evening, February 2025.
   [Slides: [html, 2.4Mb](./ecm)]
 
+## 2023
+
 * *Kummer theory for elliptic curves*.
   Short talk for Tarrach Prize 2023, March 2023.
   [Slides: [pdf, 288Kb](kummer-tarrach.pdf)]
 
+## 2022
+
 * *Kummer theory for commutative algebraic groups*.
   Seminar at the university of Leiden, September 2022.
   [Slides: [pdf, 1.2Mb](slides-kummer-final.pdf)]
@@ -59,6 +52,8 @@
   Invited talk at the University of Groningen, February 2022.
   [Slides: [pdf, 249Kb](division-groningen.pdf)]
 
+## 2021
+
 * *A category of division modules*.
   University of Luxembourg Number Theory seminar, November 2021.
   [Notes: [pdf, 270Kb](notes-division-modules.pdf)]
@@ -80,6 +75,8 @@
   [Slides: [pdf, 210Kb](slides-groupcohomec.pdf);
    [Video](https://vimeo.com/526814236/1a640285c0?embedded=true&source=video_title&owner=47245911)]
 
+## 2020
+
 * *Kummer theory for algebraic groups*.
   Invited talk at the University of Bristol (online), October 2020.
   [Slides: [pdf, 239Kb](slides-tronto-bristol.pdf)]
@@ -88,6 +85,17 @@
   University of Luxembourg PhD seminar (online), April 2020.
   [Slides: [pdf, 280Kb](slides-alggroupsfieldext.pdf)]
 
+* *Cubo di Rubik e Speedcubing (ITA)*.
+  Invited talk at Università di Cagliari, January 2020.
+  [Slides: [pdf, 2.0Mb](cubo-cagliari.pdf)]
+
+## 2019
+
+* *L'importanza del software libero nella ricerca (ITA)*.
+  Linux day in Feltre, October 2019.
+  [Slides: [pdf, 804Kb](linuxday2019.pdf);
+   [Video](https://www.youtube.com/watch?v=FB0YIYNp3rw)]
+
 * *Field extensions and elliptic curves*.
   University of Luxembourg PhD Day, October 2019.
   [Slides: [pdf, 6.0Mb](slides-fieldextec.pdf)]
@@ -100,6 +108,10 @@
    Slides DIAMANT: [pdf, 271Kb](slides-kummec-diamant.pdf);
    Slides Barcelona: [pdf, 290Kb](slides-kummec-barcelona.pdf)].
 
+* *The Rubik's cube group structure in 2 minutes*.
+  Speed talk at the AAN Symposium, May 2019.
+  [Slides: [pdf, 1.2Mb](cube-2min-slides.pdf)]
+
 * *Divisibility of points in algebraic groups*.
   Invited talk at the University of the Basque Country, May 2019.
   [Notes: [pdf, 231Kb](notes-bilbao.pdf)]
@@ -113,16 +125,14 @@
   University of Luxembourg interdisciplinary seminar, March 2019.
   [Slides: [pdf, 598Kb](slides-local-global.pdf)]
 
+## 2018
+
 * *Local-global principle for torsion*.
   University of Luxembourg Number Theory seminar, November 2018.
   [Notes: [pdf, 208Kb](notes-katz.pdf)]
 
-## Cubing
+## 2012
 
-* *Cubo di Rubik e Speedcubing (ITA)*.
-  Invited talk at Università di Cagliari, January 2020.
-  [Slides: [pdf, 2.0Mb](cubo-cagliari.pdf)]
-
-* *The Rubik's cube group structure in 2 minutes*.
-  Speed talk at the AAN Symposium, May 2019.
-  [Slides: [pdf, 1.2Mb](cube-2min-slides.pdf)]
+* *Linux from scratch (ITA)*
+  Linux day in Sedico, October 2012.
+  [Video](https://www.youtube.com/watch?v=h7xW7iq-ApA).