28 Apr
                
                    2014
                
            
            
                28 Apr
                
                '14
                
            
            
            
        
    
                8:52 a.m.
            
        The following looks interesting. There is now a family of FEEC spaces corresponding to serendipity elements on quads/hexes. http://arxiv.org/abs/1404.6275 cheers --cjc