 We find that for arbitrary functional form of the volatility, \sigma(y), the (1 + 2) evolution equation admits always two Lie symmetries, plus the linear symmetry and the infinity number of solution symmetries.
<fluency>  We find that for arbitrary functional form of the volatility, \sigma(y), the (1 + 2) evolution equation admits always two Lie symmetries, plus the linear symmetry and the infinity number of solution symmetries.
 We find that for arbitrary functional form of the volatility, \sigma(y), the (1 + 2) evolution equation admits always two Lie symmetries, plus the linear symmetry and the infinite number of solution symmetries.