你是不是写了y'=...之类的式子了？正确的写法是y'[x]=...的形式，你试试看是不是这个问题。
Out[72]= DSolve[E^x y == E^x y[x], y[x], x]In[60]:= DSolve[y'[x] + 2 x*y[x] == x*Exp[-x^2/2], y[x], x]\:6B63\:5728\:8BA1\:7B97In[60]:= DSolve::dvnoarg: The function y appears with no arguments. >>...
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public function store(Request $request): RedirectResponse { $validator = Validator::make($request->all(), [ 'title' => 'required|unique:posts|max:255', 'body' => 'required', ]); if ($validator->fails()) { return redirect('/post/create') ->withErrors($validator) ->withInput(); ...
Most of your interaction with the Python subprocess module will be via the run() function. This blocking function will start a process and wait until the new process exits before moving on. The documentation recommends using run() for all cases that it can handle. For edge cases where you ...
If some built-in functions are overloaded in a class or on the path, Code Analyzer messages might apply to the built-in function, but not to the overloaded function you are calling. In this case, suppress the message on the line where it appears or suppress it for the entire file. For...
This value appears to always be set to 0, yet the operating system still calls the DLL initialization function for all four events.The following values are defined: Expand table 1 Call when DLL is first loaded into a process's address space 2 Call when a thread terminates 4 Call when a...
The directivesrtmp_auto_push,rtmp_auto_push_reconnectandrtmp_socket_dirwill not function on Windows except on Windows 10 17063 and later versions, becauserelayin multiple processes mode needs help of Unix domain socket, please refer toUnix domain socket on Windows 10for details. ...
if i give my client a flat image with no layers, i can do it while i export from lightroom. but i want a way to do it while i keep the layers is there a photoshop script to do that? Thank you in advance TOPICS Actions and scripting Views...
Substitution replaces the argument of a function with another function (possibly the original one); primitive recursion defines a new function on the basis of a recursive call to itself, bottoming out in a previously defined function (Lobina, 2017); minimisation (also termed ‘bounded search’) ...