Question:


  let $\alpha$ be a infinite cardinal , show that:
  $$\alpha=\aleph_{0}\alpha$$
  where $\aleph_{0}$ is the cardinality of the natural numbers is denoted aleph-null


this equation is from a book,and I can't prove it,and the author say this is important equation,and can't prove it.Thank you for you help


Question: How to export PNG to be compatible with all browsers
Answer: See this thread from the Apple support, but Safari uses the monitor's colorspace, which is different than most browsers, which only use sRGB. Hopefully the article will have some good information for you.