# How are the IVs of SHA-512/256 and SHA-512/224 calculated?

This seems odd to me, because there are a lot of resources out there saying that the initializer values of SHA-512 and SHA-384 are the first 64 bits of the fractional parts of the square roots of prime numbers. For SHA-256 and SHA-224, the 32 LSBs or MSBs of those values are used.

But this question came into my mind that what about SHA-512/224? How on earth are 0x8C3D37C819544DA2 and others calculated? And I have searched a lot and ironically, had no luck.

So, how are those calculated?