# Cholla_PM: Zeldovich Reconstruction Comparison

Here is the comparison for Zeldovich test using different reconstruction methods after the shock is developed, all cases use **HLLC** and **VL**, the Dual Energy parameters are:

Here using **PPMP**:

### PPMC Reconstruction:

From the **CHOLLA** paper:

*Our implementation of this method closely follows that outlined in Stone et al. (2008).*

But from **Stone et al. (2008)** equation 46:

The signs are different. Changing the signs in **ppmc_cuda.cu** to match Stone (2008), I get the next result:

Seems similar to the evolution using **PPMP**, looks like there is an inconsistency between reconstruction methods.