<math xmlns='http://www.w3.org/1998/Math/MathML'><semantics><mrow xref='id6'><mrow xref='id3'><mi xref='id1'>u</mi><mo>⁡</mo><mfenced><mn xref='id2'>0</mn></mfenced></mrow><mo>=</mo><mrow xref='id5'><msqrt><mn xref='id4'>2</mn></msqrt></mrow></mrow><annotation-xml encoding='MathML-Content'><apply id='id6'><eq/><apply id='id3'><ci id='id1'>u</ci><cn id='id2' type='integer'>0</cn></apply><apply id='id5'><root/><cn id='id4' type='integer'>2</cn></apply></apply></annotation-xml><annotation encoding='Maple'>u(0) = 2^(1/2)</annotation></semantics></math>