diff --git a/data/sesiones.yml b/data/sesiones.yml
index 36e8ee9..6ec82bf 100644
--- a/data/sesiones.yml
+++ b/data/sesiones.yml
@@ -9,8 +9,8 @@
   charlas:
   - titulo: Around (*)
     abstract: <p>In this talk I will present work motivated by the derivation of the \(\mathbb P_{max}\) axiom \((*)\) from Martin's Maximum\(^{++}\).</p>
-    start: 2021-09-13T15:00
-    end: 2021-09-13T15:45
+    start: 2021-09-14T16:45
+    end: 2021-09-14T17:30
     speaker: David Asperó (University of East Anglia, Inglaterra)
   - titulo: Group operations and universal minimal flows
     abstract: <p>Every topological group admits a unique, up to isomorphism, universal minimal that maps onto every minimal (with respect to inclusion) flow. We study interactions between group operations and corresponding universal minimal flows.</p>
@@ -33,8 +33,8 @@
   - titulo: Hereditary interval algebras and cardinal characteristics of the continuum
     abstract: | 
       <p>An interval algebra is a Boolean algebra which is isomorphic to the algebra of finite unions of half-open intervals, of a linearly ordered set. An interval algebra is hereditary if every subalgebra is an interval algebra. We answer a question of M. Bekkali and S. Todorcevic, by showing that it is consistent that every \(\sigma\)-centered interval algebra of size \(\mathfrak{b}\)  is hereditary. We also show that there is, in ZFC, an hereditary interval algebra of cardinality \(\aleph_1\).</p>
-    start: 2021-09-14T16:45
-    end: 2021-09-14T17:30
+    start: 2021-09-13T15:00
+    end: 2021-09-13T15:45
     speaker: Carlos Martinez-Ranero (Universidad de Concepción, Chile)
   - titulo: Groups definable in partial differential fields with an automorphism
     abstract: |
@@ -56,7 +56,7 @@
       <p>We'll also compare our formalization with the recent one by Jesse M. Han and Floris van Doorn in the proof assistant Lean.</p>      
     start: 2021-09-13T17:30
     end: 2021-09-13T18:15
-    speaker: Sánchez Terraf (Universidad Nacional de Córdoba, Argentina) joint with Emmanuel Gunther, Miguel Pagano, and Matías Steinberg
+    speaker: Pedro Sánchez Terraf (Universidad Nacional de Córdoba, Argentina) joint with Emmanuel Gunther, Miguel Pagano, and Matías Steinberg
   - titulo: On non-classical models of ZFC
     abstract: |
       <p>In this talk we present recent developments in the study of non-classical models of ZFC. </p>