Nonsolvable Subalgebras of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi mathvariant="fraktur">g</mml:mi><mml:mi mathvariant="fraktur">l</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn mathvariant="normal">4</mml:mn><mml:mo>,</mml:mo><mml:mi mathvariant="double-struck">R</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>
Journal of mathematics