## Reduced density matrix and partial trace

Posted on Wed 03 May 2017 in Physics

The reduced matrix is defined as the partial trace of the density matrix. In linear algebra and functional analysis, the partial trace is a generalization of the trace. Whereas the trace is a scalar valued function on operators, the partial trace is an operator-valued function. The partial trace has applications in quantum information and decoherence which is relevant for quantum measurement and thereby to the decoherent approaches to interpretations of quantum mechanics, including consistent histories and the relative state interpretation.

## 对换钱悖论的贝叶斯分析

Posted on Tue 04 April 2017 in ProbStat

## Blogging with Jupyter and Pelican

Posted on Thu 30 March 2017 in Computer

ipynb2pelican is used to provide jupyter ipynb support in pelican.

## Installation and Setup¶

• Jupyter, and an article telling what is jupyter notebook
• Pelican, pythonic blog system supports markdown, rst, asciidoc, ipynb etc.
• ipynb2pelican, a plugin enables ipynb support by metacell
• ghp-import is needed for github page import. It can be …

## ipynb2pelican Plugin released!

Posted on Mon 27 March 2017 in Computer

Yet another Pelican Plugin for blogging with Jupyter Notebooks using MetaCell to store metadata.

Thanks to super cow power of python, we can finally publish ipynb easily! Below is the README.md from the project at this time.

The ipynb2pelican plugin provides markup for Jupyter/IPython notebooks in pelican, so …

## Next Permutation

Posted on Fri 24 March 2017 in Puzzles

Aim: Find a larger permutation

We must move a larger number forward. So we should go from the tail to find any new number is smaller than a number behind it. If no next permutation, reverse list.

In [ ]:
def next_permutation(l):
'''Give out the next permutation of list l
>>> next_permutation …

## Notes for Chapter 4. Gaussian Models

Posted on Mon 20 March 2017 in MLAPP

## Solutions for Chapter 4. Gaussian Models

Posted on Mon 20 March 2017 in MLAPP

## Solutions for Chapter 3 Generative models for discrete data

Posted on Thu 09 March 2017 in MLAPP

## Notes on Chapter 2 Probability

Posted on Wed 08 March 2017 in MLAPP

## Solutions for Chapter 2 Probability

Posted on Wed 08 March 2017 in MLAPP