Release notes *2.9.2*

Release candidate (preview)%3Cbr%20%2F%3EMon 22 Dec 2025 10:36:03

Improved Math Input

We’ve come a long way toward one of Wolfram Mathematica’s signature features: 2D mathematical input. This “syntax sugar” transforms plain text like Sqrt into properly typeset square roots and fractions, helping blur the line between writing code and presenting mathematics.

Your maintainers, Kirill Vasin and Kirill Belov, are happy to announce that we’ve finally reached this milestone by adding the last missing piece to the cell editor: auto-adjustable brackets/parentheses:

{(*SqB[*)Sqrt[2](*]SqB*), (*SpB[*)Power[2(*|*),(*|*)1/4](*]SpB*)} - {((*FB[*)((1)(*,*)/(*,*)(2))(*]FB*) - 1), 0} + {1,1}

{(*FB[*)((3)(*,*)/(*,*)(2))(*]FB*)+(*SqB[*)Sqrt[2](*]SqB*),1+(*SpB[*)Power[2(*|*),(*|*)1/4](*]SpB*)}

We locate and match all such elements, measure the height of the range they span, and then select one of four KaTeX fonts to render each element. The remaining challenge has always been performance—how to make this efficient, i.e.

\[Alpha] (-(*FB[*)((g g2 \[Omega])(*,*)/(*,*)((*SpB[*)Power[\[Alpha]L(*|*),(*|*)2](*]SpB*)+(*SpB[*)Power[\[Omega](*|*),(*|*)2](*]SpB*)))(*]FB*)+(*FB[*)((gp kp \[Gamma]ph \[Omega])(*,*)/(*,*)(Mph (((*SpB[*)Power[\[Gamma]ph(*|*),(*|*)2](*]SpB*)) ((*SpB[*)Power[\[Omega](*|*),(*|*)2](*]SpB*))+(*SpB[*)Power[(-((*SpB[*)Power[\[Omega](*|*),(*|*)2](*]SpB*))+(*SpB[*)Power[\[Omega]0(*|*),(*|*)2](*]SpB*))(*|*),(*|*)2](*]SpB*))))(*]FB*)+((*SpB[*)Power[\[Omega](*|*),(*|*)\[Mu]](*]SpB*)) Sin[((*FB[*)((1)(*,*)/(*,*)(2))(*]FB*)) \[Pi] \[Mu]])

The expression above is fully editable—unlike in Wolfram Cloud, where similar input is effectively “backed” by a static representation

R[ω_, params__] := (*SpB[*)Power[Abs[(*FB[*)((n[ω, params] - 1.)(*,*)/(*,*)(n[ω, params] + 1.))(*]FB*)](*|*),(*|*)2](*]SpB*)

It would be a shame if we took all the credit. We’re truly grateful to Marijn Haverbeke—an outstanding programmer, the author of the JavaScript bible Eloquent JavaScript, and the creator of CodeMirror 6, the core component behind WLJS Notebooks. He was also kind enough to answer our dumb questions on his website—for free 🥰

InputRange extensions

We added a new Appearance for InputRange element, allowing to have a fine-tuning $\pm 10\%$ of a variable parameter

InputRange[0,1,0.1, Appearance->"FineTuning"]

(*VB[*)(EventObject[<|"Id" -> "3eba0b3c-6dc2-493f-93ae-4b6b53df0f1c", "Initial" -> 0.5, "View" -> "563988d8-a52e-49f1-a3f4-6ab18f8bf890"|>])(*,*)(*"1:eJxTTMoPSmNkYGAoZgESHvk5KRCeEJBwK8rPK3HNS3GtSE0uLUlMykkNVgEKm5oZW1pYpFjoJpoapeqaWKYZ6iYap5nomiUmGVqkWSSlWVgaAAB9iRWO"*)(*]VB*)

Another feature is "debouncing" option when InputRange is used with "TrackedExpression" allowing to prevent a loop of event calls, when event generator updates its tracked expression

var = 0.3;
EventHandler[
  InputRange[0,10, "TrackedExpression"->{Offload[var], "Debounce"}], 
  Function[v, var = v]
]

(*VB[*)(EventObject[<|"Id" -> "af54e24c-4b65-4672-a0f0-faff84500dfd", "Initial" -> 5, "View" -> "e5c1a681-ad97-405c-a6fe-51d4916d0a1a"|>])(*,*)(*"1:eJxTTMoPSmNkYGAoZgESHvk5KRCeEJBwK8rPK3HNS3GtSE0uLUlMykkNVgEKp5omGyaaWRjqJqZYmuuaGJgm6yaapaXqmhqmmFgamqUYJBomAgCH/xXJ"*)(*]VB*)

var = 4.0; (*BB[*)(*now try this*)(*,*)(*"1:eJxTTMoPSmNhYGAo5gcSAUX5ZZkpqSn+BSWZ+XnFaYwgCS4g4Zyfm5uaV+KUXxEMUqxsbm6exgSSBPGCSnNSg9mAjOCSosy8dLBYSFFpKpoKkDkeqYkpEFXBILO1sCgJSczMQVYCAOFrJEU="*)(*]BB*)