A panel of judges in the Court of Appeal is to be asked to grapple with the meaning of the word "genius" in the case of a multimillionaire husband seeking a bigger slice of the wealth he once shared with his wife in a divorce settlement. 

Randy Work, an American financier, is seek to overturn as order at the High Court last year awarding his estranged wife, Mandy Gray, half of a fortune, totalling more than £140 million.