End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
http://karamodir.farafile.ir/file/39051/تحقیق-تبدیل-فوریه-گسسته-(dft)-و-تبدیل-فوریه-سریع-(fft)