"spiralling problem" is correct and commonly used in written English.
You could use it to refer to an issue or challenge that is rapidly becoming worse or more complex over time. For example, "The spiralling problem of homelessness in our city is becoming harder and harder to ignore."
But falling user numbers mean fewer sales and a spiralling problem for the company.
A country where there is both an obsession with body image and a spiralling problem with obesity.
@nimrodnim describes this spiralling problem very well: nimrodnim 06 March 2014 12 39pm Where I am, (in a southern city - outside London) no one can afford to move because the 'next rung up' is ridiculously expensive - so people who own are either cramming their family into housing that is too small, or trying to extend however and wherever they can.
The Empty Homes Agency – an organisation that campaigns for empty homes to be used as housing for those who need it – say there are 610,000 empty houses across Britain which could be utilised to resolve this spiralling problem.
Local councils are calling for the same power as London to fine the owner of a vehicle when a passenger drops litter – in an attempt to tackle what it called a "staggering and spiralling" problem of rubbish along the country's roads.
The Fuel Poverty Advisory Group has called on Prime Minister David Cameron to tackle what it describes as a "spiralling" problem.
"We have had to face up to some harsh truths: generations of families dependent on benefits; spiralling problems with obesity and alcohol misuse, and above all the creation of a super underclass; an invisible army of people disconnected and cut off from the opportunities being created on their own doorsteps," she said.
The HNFQ system is evaluated in three well known benchmark applications: the sinc x,y) function approximation, the Mackey Glass chaotic series forecast and the two spirals problem.
Thus, whereas data for n-parity or the two spirals problem are non-separable by a hyper plane in input space, it can be separated in the feature space by the proper kernels (Scholkopf et al. 1998; Walczack and Massart 1996; Rosipal and Trejo 2004; Mika et al. 1999; Scholkopf and Smola 2002; Gunn 1997).
The experimental results show the performance of the algorithm presented in a series of classical benchmark problems including the 2-spiral problem and the Iris, Wine, Glass, Lenses, Ionosphere, Lung cancer, Pima Indians, Bupa, TicTacToe, Balance and Zoo data sets from the UCI machine learning repository.
But interviews with the people who have actually fought the gang Trump fan Oliver North calls "the ISIS of the Western Hemisphere" paint a picture of a spiraling problem compounded by a legacy of local corruption and brutality.
