mathematical vandalism

does anyone know where to get a cheap huge whiteboard? other than ebay, where the shipping is gonna cost more than the item, of course.



cause i definitely need one. my closet doors are not big enough.

to those who are curious, those are maxwell curl equations (faraday's and ampere's law) in cylindrical and rectangular coordinates for a waveguide. i got the derivation down, but the physical representation still confuse me. anyone familiar with TM and TE modes for waveguides?