Issues

• Relations, maps and in:: the agreed design, the decisions made and the questions still open

  area: relationsdatarecord-alignmentdesign: accepted
  energy-models/mathspec#1000 · Filter by author FBumann opened on Nov 12, 2026
  5

• a curve may leave a gap between two of its pieces

  area: formulationsdesign: open
  energy-models/mathspec#995 · Filter by author FBumann opened on Nov 10, 2026

• an adjacency curve whose run starts late is its hull

  area: formulationsbug: silentbug
  energy-models/mathspec#993 · Filter by author FBumann opened on Nov 10, 2026

• Use a count_nonzero operator instead of the sos top-level key

  energy-models/mathspec#990 · Filter by author brynpickering opened on Nov 10, 2026
  1

• A piecewise entry cannot choose its method from the data, as PyPSA's method="auto" does

  area: formulationsdesign: open
  energy-models/mathspec#981 · Filter by author FabianHofmann opened on Nov 5, 2026

• canonical order with dimension before given?

  area: composition
  energy-models/mathspec#973 · Filter by author FabianHofmann opened on Oct 30, 2026
  2

• TIMES' GAMS math could port to mathspec (11 gaps identified requiring a workaround)

  energy-models/mathspec#969 · Filter by author brynpickering opened on Oct 30, 2026

• a bare numeric name in a condition: docs disagree on whether it asks 'has a row' or 'has a row and is finite'

  docs
  energy-models/mathspec#953 · Filter by author FabianHofmann opened on Oct 26, 2026

• Datarecord alignment

  meta
  energy-models/mathspec#944 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord
  5

• Use curve operator instead of having piecewise constraint section

  design: open
  energy-models/mathspec#943 · Filter by author brynpickering opened on Oct 22, 2026
  7

• Extend where to parameters/relations

  design: open
  energy-models/mathspec#941 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord
  2

• Cased missing

  design: open
  energy-models/mathspec#940 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord
  3

• relations -> properties

  design: open
  energy-models/mathspec#939 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord
  1

• Expand dtypes beyond those that can be used in math

  design: open
  energy-models/mathspec#938 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord
  1

• Limit expression / constraint to rows without breakpoints

  design: open
  energy-models/mathspec#937 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord

• Define piecewise x breakpoint values as extra data in parameters

  design: open
  energy-models/mathspec#936 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord
  1

• Enable multi-dimensions

  design: open
  energy-models/mathspec#935 · Filter by author brynpickering opened on Oct 22, 2026 · Align to datarecord
  10

• Two variables whose where: names each other load, although neither can say where the other exists

  bug
  energy-models/mathspec#928 · Filter by author FBumann opened on Oct 21, 2026

• Three follow-ups on open PRs: freeze the spec models, honour exclude={'version'}, and sort a relation's key columns by dimension

  energy-models/mathspec#922 · Filter by author FBumann opened on Oct 21, 2026

• Too many different words for referencing a condition string

  design: accepted
  energy-models/mathspec#910 · Filter by author brynpickering opened on Oct 20, 2026

• A curve stated as lines over links with different dimensions loads, and then its expansion is refused

  bug
  energy-models/mathspec#891 · Filter by author FBumann opened on Oct 16, 2026

• The canonical form keeps cases and relation columns in file order, so two files that state one spec differ in it

  bug
  energy-models/mathspec#890 · Filter by author FBumann opened on Oct 16, 2026

• assumptions can be used to enforce absence

  energy-models/mathspec#876 · Filter by author brynpickering opened on Oct 12, 2026
  1

• assumptions can check for completeness of expressions / constraints

  energy-models/mathspec#866 · Filter by author brynpickering opened on Oct 10, 2026
  1

• Decide before 1.0.0 whether the language keeps macros

  v1.0.0
  energy-models/mathspec#865 · Filter by author FBumann opened on Oct 9, 2026