 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.
<meaning-changed>  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 always admits two Lie point symmetries in addition to the automatic linear symmetry and the infinity number of solution symmetries.