# SymPy 0.5.4¶

5 Oct 2007

• Log and ApplyLog classes were simplified to log, as was in the 0.4.3 version (the same for all other classes, like sin or cos).
• Limits algorithm was fixed and it works very reliably (there are some bugs in the series facility though that make some limits fail), see this post for more details.
• All functions arguments are now accessed using the sin(x)[:] idiom again, as in the 0.4.3 version (instead of the old sin(x)._args or sin(x).args which was briefly introduced in the 0.5.x series).