R/078_atoms_elementwise_inv_pos.R

In CVXR: Disciplined Convex Optimization

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## DO NOT EDIT THIS FILE!! EDIT THE SOURCE INSTEAD: rsrc_tree/atoms/elementwise/inv_pos.R
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## CVXPY SOURCE: atoms/elementwise/inv_pos.py
## InvPos -- inverse of positive value x^{-1}

#' Inverse position: \eqn{x^{-1}} (for x > 0)
#'
#' @param x An Expression
#' @returns A Power atom with p=-1
#' @export
inv_pos <- function(x) {
  ## `power()`, NOT `Power()` -- inv_pos.py:7 is `return power(x, -1)`, the
  ## wrapper, whose `approx = TRUE` default canonicalizes to SOC.  Constructing
  ## `Power` directly emits PowCone3D and locks out every SOC-only solver.
  ## p = -1 is exactly representable, so the SOC form is exact.
  power(x, -1)
}