PTAS or Ptas may refer to:

  • Polynomial-time approximation scheme in computer science
  • Power & Thermal Aware Scheduling in computer science
  • Pesetas, Spanish currency
  • PTAS reduction, a reduction that is often used to perform reductions between solutions to optimization problems

Other articles related to "ptas, pta":

Parent-Teacher Association - PTAs in The United Kingdom
2007" found that 83 per cent of primary schools, and 60 per cent of secondary schools had a "PTA or equivalent" ... In England, Wales and Northern Ireland PTAs may choose to join PTA-UK which describes itself as "The national charity representing over 13,750 PTAs across England, Wales and Northern Ireland" which seeks "To advance ... The Scottish Parent Teacher Council" PTAs are, in general not involved in the Governance of Schools, that is a matter for the school governing bodies, but in practice parents who are active in the PTA will tend to ...
PTAS Reduction
... In computational complexity theory, a PTAS reduction is a reduction that is often used to perform reductions between solutions to optimization problems ... It preserves the property that a problem has a polynomial time approximation scheme (PTAS) and is used to define completeness for certain classes of ... Notationally, if there is a PTAS reduction from a problem A to a problem B, we write ...
Passenger Transport Executive - History
... The first PTEs and PTAs were established in the late 1960s by the Transport Act 1968 as transport authorities serving large conurbations, by the then ... The 1974 reorganisation also abolished the PTAs, and their role was taken over by the Metropolitan county councils (MCCs) ... However when the MCCs were abolished in 1986, the PTAs were re-created ...
... to have a polynomial-time approximation scheme (PTAS) ... can be shown that there are problems that are in APX but not in PTAS that is, problems that can be approximated within some constant factor, but not every constant factor ... A problem is said to be APX-hard if there is a PTAS reduction from every problem in APX to that problem, and to be APX-complete if the problem is APX-hard ...