Re: [eigen] problem with MKL bindings for dense Eigen |

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*To*: eigen <eigen@xxxxxxxxxxxxxxxxxxx>*Subject*: Re: [eigen] problem with MKL bindings for dense Eigen*From*: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>*Date*: Mon, 9 Apr 2018 16:13:51 +0200*Dkim-signature*: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=N1rIGa+JL5LHLTwkXUqVGf9ulPIz+Z1FRynE7AWParQ=; b=htiDikClI36EXFdUxCOSUJJYMAJOlyK7drI1/dz+/bYGHSju+VC79Mc0H2fKVWYTXy TboQUHvi6ncFxW1sucXQXiuPnc4gssGm7dhZa09jDDu4zD2i2R/vMTvlheicG2cECYDJ co29M8HEUDQ3c3KzhSsHd3wDDzaEdqteTiiECeVuT7ANgkEYkm2/+Rmd9FttZ15QqQ3A HmJFNLGZP8h806toa+FuU9RtP30i6ONLq6WX+n7pcsPGF2ZkCoC6at9cG14pWzbeNcA2 dv5c7AOYyNLC2GXsljoYazw6rIUiSuBVM5q7I/0MQbZNGimW4Dfm/XvdqWhFATPebVLI TRWg==

On Mon, Apr 9, 2018 at 3:09 PM, Peter <list@xxxxxxxxxxxxxxxxx> wrote:

Dear Gael,

Am 09.04.2018 um 13:31 schrieb Gael Guennebaud:

> I see.

>

> Problem fixed: https://bitbucket.org/eigen/eigen/commits/ (in 3.3 too).3a08a093adac

indeed, thanks.

BTW, the MKL version is now consistently more accurate than Eigen without MKL.

Could be a hint on the usage of FMA, but I'm just guessing.

It's more likely more accuracy in the lowest eigenvalues as we assume that eigenvalues lower than machine_epsilon * largest_eigenvalues are zero.

gael

Best regards,

Peter

**Follow-Ups**:

**References**:**[eigen] problem with MKL bindings for dense Eigen***From:*Peter

**Re: [eigen] problem with MKL bindings for dense Eigen***From:*Gael Guennebaud

**Re: [eigen] problem with MKL bindings for dense Eigen***From:*Peter

**Re: [eigen] problem with MKL bindings for dense Eigen***From:*Gael Guennebaud

**Re: [eigen] problem with MKL bindings for dense Eigen***From:*Peter

**Re: [eigen] problem with MKL bindings for dense Eigen***From:*Gael Guennebaud

**Re: [eigen] problem with MKL bindings for dense Eigen***From:*Peter

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