#Copyright RomanAILabs - Daniel Harding 2025 ```python import numpy as np from scipy.linalg import solve class FiveDSpacetimeEngine: def __init__(self, metric_tensor): self.metric_tensor = metric_tensor def spatial_metric(self, point): return self.metric_tensor[:, :3, :3].dot(point) + np.transpose(point).dot(self.metric_tensor[:, :3, :3]) def spatial_distance(self, point1, point2): """Calculate the spatial distance between two points.""" spatial_part = self.spatial_metric(point1 - point2) return np.sqrt(np.trace(spatial_part)) def time_derivative(self, point, tangent_vector): """Calculate the time derivative of a tangent vector in 5D spacetime.""" spatial_part = self.spatial_metric(point) time_derivative = tangent_vector[3] return np.array([spatial_part[:, i] for i in range(4)]) + time_derivative def geodesic_equation(self, point, tangent_vector): """Solve for the geodesic equation.""" spatial_part = self.spatial_metric(point) tangent_vector = np.array(tangent_vector) # Derivative of the tangent vector tangent_derivative = self.time_derivative(point, tangent_vector) # Solve for the geodesic using the metric and the derivative of the tangent vector A = np.zeros((5, 5)) b = np.zeros(5) for i in range(4): A[3, 3] += 1 # Time derivative of the tangent vector A[i, 4] = tangent_derivative[i] b[i] = tangent_derivative[i] # Solve the system of equations tangent_derivative = solve(A, b) # Update the tangent vector tangent_vector[3] += tangent_derivative[3] for i in range(4): tangent_vector[i] += tangent_derivative[i] return tangent_vector def geodesic(self, initial_point, initial_tangent_vector, time_interval, dt): """Calculate the geodesic of a point over a given time interval.""" point = initial_point tangent_vector = initial_tangent_vector geodesic_points = [point] geodesic_tangent_vectors = [tangent_vector] for _ in range(int(time_interval / dt)): point, tangent_vector = self.geodesic_equation(point, tangent_vector) geodesic_points.append(point) geodesic_tangent_vectors.append(tangent_vector) return geodesic_points, geodesic_tangent_vectors if __name__ == "__main__": # Example metric tensor for a 5D spacetime metric_tensor = np.array([ [1, 0, 0, 0, 0], [0, 1, 0, 0, 0], [0, 0, 1, 0, 0], [0, 0, 0, 1, 0], [0, 0, 0, 0, 1] ]) engine = FiveDSpacetimeEngine(metric_tensor) initial_point = np.array([1, 0, 0, 0, 0]) initial_tangent_vector = np.array([0, 0, 0, 1, 0]) time_interval = 100 dt = 0.1 geodesic_points, geodesic_tangent_vectors = engine.geodesic(initial_point, initial_tangent_vector, time_interval, dt) for point, tangent_vector in zip(geodesic_points, geodesic_tangent_vectors): print("Point:", point) print("Tangent Vector:", tangent_vector) print("\n") ```