From 38dcc5f3c2c32401a85c321948a01af345f62158 Mon Sep 17 00:00:00 2001
From: Julian Piribauer <julian.piribauer@gmail.com>
Date: Sun, 26 Jul 2026 13:18:01 +0200
Subject: [PATCH] Adding class for projective ambient spaces

---
 sage/toric_topdata.sage | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/sage/toric_topdata.sage b/sage/toric_topdata.sage
index c5fe0a3..a77ca66 100644
--- a/sage/toric_topdata.sage
+++ b/sage/toric_topdata.sage
@@ -739,4 +739,35 @@ class ToricPolytopeCICY(ToricPolytope):
             nef_partition=nef_partition,
             lvec=lvec
         )
- 
\ No newline at end of file
+    
+class ToricPolytopeProjectiveSpace(ToricPolytope):
+    """
+    Computes topological data for hypersurfaces in toric ambient spaces.
+    """
+    def _compute_points_from_weights(self, weights):
+        # Convert the weights of the projective space to the corresponding points
+        dimension = len(weights) - 1
+        points = identity_matrix(dimension)
+        try:
+            weights.remove(1)
+        except ValueError:
+            raise ValueError("The weights must include a 1 for the projective space.")
+
+        points = points.insert_row(0, [-w for w in weights])
+        return list(points)
+    
+    def __init__(
+            self,
+            weights,
+            no_triangulation = 0,
+            model_name = None,
+            nef_partition = None,
+            lvec = None, # Note that the inner point is the last entry
+        ):
+        super().__init__(
+            self._compute_points_from_weights(weights),
+            no_triangulation=no_triangulation,
+            model_name=model_name,
+            nef_partition=nef_partition,
+            lvec=lvec
+        )
-- 
2.54.0