code: def forward(self, t, y):
      self.nfe += 1
      return torch.mm(self.A, y.reshape(self.dim, 1)).reshape(-1)
  
file_path: torchdiffeq/tests/problems.py
imports: import math
  import numpy
  import scipy.linalg
  import torch
label_desc: Use image node_id 2 for calling the LinearODE obj's underlying member method code with example usage: obj.forward(t, y) and returns: torch