From d02e470cc7e0f8319d1e58bae628e598e3c954ab Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Tue, 8 Apr 2025 12:26:20 +0200
Subject: [PATCH] rogueviz::ds::tour:: fixed the formula for dS2

---
 rogueviz/ads/tour.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rogueviz/ads/tour.cpp b/rogueviz/ads/tour.cpp
index f8cd11dc..1ead8ab5 100644
--- a/rogueviz/ads/tour.cpp
+++ b/rogueviz/ads/tour.cpp
@@ -685,7 +685,7 @@ slide relhell_tour[] = {
       latex_slide(mode, defs+R"=(
    {\color{remph}de Sitter spacetime:}
    \begin{itemize} 
-   \item $\dS{2} = \{(x,y,z,t) \in \bbE^{3,1}: \\ x^2+y^2+z^2-t^2=-1\}$
+   \item $\dS{2} = \{(x,y,z,t) \in \bbE^{3,1}: \\ x^2+y^2+z^2-t^2=1\}$
    \item take $t=0$ -- we get $\bbS^2$
    \item the universe is expanding with $t$ \\ (not if we apply Lorentz transformation)
    \end{itemize}