Change Log¶

## [1.5] - 2017-02-16

• Optimized memory usage and efficiency
• Supported (OpenMP) threads and shard memory

## [1.1 alpha](https://github.com/sanshar/Block/tree/v1.1-alpha) - 2016-02-12

• New NEVPT2 implementation based on MPS perturber
• 1, 2, 3, 4-particle density matrices
• 1, 2-particle transition density matrices

## [1.0.1](https://github.com/sanshar/Block/tree/v1.0.1) - 2015-07-19

• fixed mpi runtime error; processors now write intermediates files into different directories under scratch;
• now printing summed cpu timings from all processors;
• fixed error of orbital reordering in restart_npdm;
• removed bugs in PT calculations;
• test reference data now cleaned and consistent.

## [1.0.0](https://github.com/sanshar/Block/tree/v1.0.0) - 2015-03-27

• warm-up step faster
• npdm up to fourth-order as well as transition pdm up to second-order

## [0.9.7] - 2013-02-17

## [0.9] - 2012-09-21