Stephen Ng

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We consider the class of quantum spin chains with arbitrary Uq(sl2)-invariant nearest neighbor interactions, sometimes called SUq(2) for the quantum deformation of SU(2), for q > 0. We derive sufficient conditions for the Hamiltonian to satisfy the property we call Ferromagnetic Ordering of Energy Levels. This is the property that the ground state energy(More)
A 57-year-old woman presented with intensely pruritic generalized eruptive keratoacanthomas affecting cutaneous and mucosal surfaces (Grzybowski syndrome). She derived marginal benefit from anti-pruritic agents, acitretin and methotrexate. However, cyclophosphamide 100 mg daily for 1 month followed by 3 months at 200 mg daily resulted in remarkable(More)
Cutaneous myiasis is seen in travellers returning from the tropics. The flies commonly involved are Cordylobia arthropophaga and Dermatobia hominis. Humans become infected by contact with eggs laid by the female fly on soil or contaminated clothing. The clinical presentation is boil-like skin lesions. Treatment involves asphyxiation of larvae forcing(More)
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