Frank Hansen

Metric adjusted skew information: Convexity and restricted forms of superadditivity (2009)

Cai, Liang, Hansen, Frank

We give a truly elementary proof of the convexity of metric adjusted skew information following an idea of Effros. We extend earlier results of weak forms of superadditivity to general metric...

Non-commutative Hardy inequalities (2008)

Hansen, Frank

We extend Hardy's inequality from sequences of non-negative numbers to sequences of positive semi-definite operators if the parameter p satisfies 1

Some operator monotone functions (2008)

Hansen, Frank

We prove that the functions t -> (t^q-1)(t^p-1)^{-1} are operator monotone in the positive half-axis for 0 < p < q < 1, and we calculate the two associated canonical representation formulae. The...

Decreasing Relative Risk Premium (2007)

Hansen, Frank

We consider the risk premium demanded by a decision maker in order to be indifferent between obtaining a new level of wealth with certainty, or to participate in a lottery which either results in...

Decreasing Relative Risk Premium (2007)

Hansen, Frank

We consider the risk premium demanded by a decision maker in order to be indifferent between obtaining a new level of wealth with certainty, or to participate in a lottery which either results in...

Decreasing Relative Risk Premium (2007)

Hansen, Frank

We consider the risk premium demanded by a decision maker in order to be indifferent between obtaining a new level of wealth with certainty, or to participate in a lottery which either results in...

Egg production and hatching success in the calanoid copepods Calanus helgolandicus and Calanus finmarchicus in the North Sea from March to September 2001 (2005)

Jónasdóttir, Sigrún H., Trung, Nguyen Huu, Hansen, Frank, Gärtner, Sanne

Spatial and seasonal egg production rates (Er) and egg hatching success in the copepods Calanus finmarchicus and Calanus helgolandicus were measured in the North Sea from March to September. Food...

Egg production and hatching success in the Calanoid copepods Calanus helgolandicus and Calanus finmarchicus in the North Sea from March to September 2001 (2005)

Jónasdóttir, Sigrún H., Trung, Nguyen Huu, Hansen, Frank, Gärtner, Sanna

Spatial and seasonal egg production rates (Er) and egg hatching success in the copepods Calanus finmarchicus and C. helgolandicus were measured in the North Sea from March to September. Food...

Novel Polymyxin Derivatives Carrying Only Three Positive Charges Are Effective Antibacterial Agents ▿

Vaara, Martti, Fox, John, Loidl, Günther, Siikanen, Osmo, Apajalahti, Juha, Hansen, Frank, ...

The lack of novel antibiotics against gram-negative bacteria has reinstated polymyxins as the drugs of last resort to treat serious infections caused by extremely multiresistant gram-negative...