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`S 0 Index`

`S 1 Introduction and General Information`

`Q whatisfftw 1.1 What is FFTW?`

`Q whereisfftw 1.2 How do I obtain FFTW?`

`Q isfftwfree 1.3 Is FFTW free software?`

`Q nonfree 1.4 What is this about non-free licenses?`

`S 2 Installing FFTW`

`Q systems 2.1 Which systems does FFTW run on?`

`Q runOnDOS 2.2 Does FFTW run on DOS/Windows?`

`Q compilerCrashes 2.3 My compiler crashes when compiling FFTW.`

`Q solarisSucks 2.4 FFTW does not compile on Solaris, complaining about \courier{const\}.`

`Q languages 2.5 Which language is FFTW written in?`

`Q fortran 2.6 Can I call FFTW from FORTRAN?`

`Q cplusplus 2.7 Can I call FFTW from C++?`

`Q whynotfortran 2.8 Why isn't FFTW written in FORTRAN/C++?`

`Q singleprec 2.9 How do I compile FFTW to run in single precision?`

`S 3 Using FFTW`

`Q slow 3.1 FFTW seems really slow.`

`Q conventions 3.2 FFTW gives results different from my old FFT.`

`Q savePlans 3.3 Can I save FFTW's plans?`

`Q whyscaled 3.4 Why does your inverse transform return a scaled result?`

`Q centerorigin 3.5 How can I make FFTW put the origin (zero frequency) at the center of its output?`

`Q imageaudio 3.6 How do I FFT an image/audio file in \italic{foobar\} format?`

`Q linkfails 3.7 My program does not link (on Unix).`

`S 4 Internals of FFTW`

`Q howworks 4.1 How does FFTW work?`

`Q whyfast 4.2 Why is FFTW so fast?`

`Q wisdom 4.3 What is this \courier{wisdom\} thing?`

`Q whywisdom 4.4 Why do you use \courier{wisdom\}? I just wanted to save a plan.`

`S 5 Known bugs`

`Q rfftwndbug 5.1 FFTW 1.1 crashes in rfftwnd on Linux.`

`Q fftwmpibug 5.2 The MPI transforms in FFTW 1.2 give incorrect results/leak memory.`

`Q testsingbug 5.3 The test programs in FFTW 1.2.1 fail when I change FFTW to use single precision.`

`Q teststoobig 5.4 The test program in FFTW 1.2.1 fails for n > 46340.`

`Q linuxthreads 5.5 The threaded code fails on Linux Redhat 5.0`

`Q bigrfftwnd 5.6 FFTW 2.0's rfftwnd fails for rank > 1 transforms with a final dimension >= 65536.`

`Q primebug 5.7 FFTW 2.0's complex transforms give the wrong results with prime factors 17 to 97.`

`Q mpichbug 5.8 FFTW 2.1.1's MPI test programs crash with MPICH.`