class_docstr: Space of parameterized discrete surfaces.
  
  Each surface is sampled with fixed `n_vertices` vertices and `n_faces`
  faces in :math:`\mathbb{R}^3`.
  
  Each individual surface is represented by a 2d-array of shape
  `[n_vertices, 3]`. This space corresponds to the space of immersions
  defined below, i.e. the
  space of smooth functions from a template to manifold :math:`M`
  into :math:`\mathbb{R}^3`, with non-vanishing Jacobian.
  
  .. math::
      Imm(M,\mathbb{R}^3)=\{ f \in C^{\infty}(M, \mathbb{R}^3)
      \|Df(x)\|\neq 0 \forall x \in M \}.
  
  Parameters
  ----------
  faces : integer array-like, shape=[n_faces, 3]
      Triangulation of the surface.
      Each face is given by 3 indices that indicate its vertices.
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docstr: Check whether the vector is tangent at base_point.
  
  Tangent vectors are identified with points of the vector space so
  this checks the shape of the input vector.
  
  Parameters
  ----------
  vector : array-like, shape=[..., n_vertices, 3]
      Vector, i.e. a 3D vector field on the surface.
  base_point : array-like, shape=[..., n_vertices, 3]
      Surface, as the 3D coordinates of the vertices of its triangulation.
  atol : float
      Absolute tolerance.
      Optional, default: backend atol.
  
  Returns
  -------
  is_tangent : array-like, shape=[...,]
      Boolean denoting if vector is a tangent vector at the base point.
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code: def is_tangent(self, vector, base_point, atol=gs.atol):
      """Check whether the vector is tangent at base_point.
  
      Tangent vectors are identified with points of the vector space so
      this checks the shape of the input vector.
  
      Parameters
      ----------
      vector : array-like, shape=[..., n_vertices, 3]
          Vector, i.e. a 3D vector field on the surface.
      base_point : array-like, shape=[..., n_vertices, 3]
          Surface, as the 3D coordinates of the vertices of its triangulation.
      atol : float
          Absolute tolerance.
          Optional, default: backend atol.
  
      Returns
      -------
      is_tangent : array-like, shape=[...,]
          Boolean denoting if vector is a tangent vector at the base point.
      """
      belongs = self.belongs(vector, atol)
      if base_point is not None and base_point.ndim > vector.ndim:
          return gs.broadcast_to(
              belongs, base_point.shape[: -self.point_ndim]
          )
      return belongs
  
imports: import math
  import geomstats.backend
  from geomstats.geometry.euclidean import Euclidean
  from geomstats.geometry.manifold import Manifold
  from geomstats.geometry.riemannian_metric import RiemannianMetric
  from geomstats.numerics.optimizers import ScipyMinimize
label_desc: Use image node_id 4 for calling the DiscreteSurfaces obj's underlying member method code with example usage: obj.is_tangent(vector, base_point, atol) and returns: belongs, gs